Sunday, November 16, 2014
Wednesday, April 9, 2014
Windows XP support ends
Do not
use Internet Explorer
It is
not advisable to keep running Microsoft's Windows XP operating system now that support has ended.
Today
(08th April, 2014), Microsoft will release its last batch of
security updates, patches, and fixes for Windows XP, and after this date, core
vulnerabilities or security issues that could leave you open to cyberattack
will not be investigated or fixed. You won't have a permenant blue wheel of
death the moment support ends, but vulnerabilities stored up by cybercriminals for
use after this date will not be fixed.
Tip
one? Stop using Internet Explorer.
The most common version
of IE used on XP systems is version 8, and considering that Internet Explorer
is now up to version 11, you can see how old and obsolete the browser is. Not
only this, but Internet Explorer 7 and 8 will also not be updated further,
leaving your system vulnerable to malware that exploits this old program.
Both
Mozilla's Firefox and
Google's Chrome browsers
will continue support for Windows XP after expiration, and so use one of these
browsers instead of Internet Explorer if you are still running XP. This will at
least give you a little more time, but be aware that Chrome on XP will only be supported for
one more year, and it is not known how long Firefox will offer support.
In addition, don't forget
to change your browser from the IE default.
Friday, September 6, 2013
The Windows 7 Benefits
The Windows 7 OS provides many new tools and features that on
improved. This new OS has been constructed to be more intuitive and less
distracting.
Decreased boot time- the average windows 7 machine will boot will boot up in
under 60 seconds. Compatibility- The flexibility of Windows 7 gives
users the ability to run almost any software that is Windows compatible.
Libraries- Windows 7 provides a new, more intuitive way of organizing
and locating documents. Instead of wasting time trying to remember where
a previously created document is stored, a user can now search for their
documents by type in different “libraries” such as communications, contacts,
documents, downloads, music, pictures and videos.
Windows Search- This enhanced search feature resembles the “auto-complete”
function that is a familiar tool in Microsoft Word. The moment a user
starts to type a word in the search field, Windows 7 will list items that match
the typed characters. The list will decrease as characters are
added. At any point, a user can preview the search results—without having
to open the document.
The Benefits
Faster, more responsive performance
- System boot time and application
launch times have noticeably decreased.
- A reduction in the time required
to place systems into and retrieve them out of hibernation mode makes
“putting your system to sleep” more convenient.
Improved taskbar and
full-screen previews
The taskbar at the bottom of your screen to switch
between open programs. In Windows 7 you
can set the order of the taskbar icons and they'll stay in that order. The icons
are larger, too. If you point to an icon, you'll see a small, preview version
of the page or program. If you point to this preview, you'll see a full-screen
preview.
Jump Lists
With Jump Lists, you can quickly find
files that you've worked with recently. Right-click a program icon on the
taskbar to see a list of recently-opened files. You can also pin files that you
use regularly to a Jump List. Some Jump Lists show commands for common tasks,
like playing music or videos.
Enhanced searching capabilities
- New options allow you to look for
keywords in documents, emails, attached storage devices, and can also
extend the search to networked servers and designated web pages.
Location aware printing
- When you connect to a network,
Windows 7 will automatically detect your location and select the proper
printers for your print jobs.
Virtual hard disk support
- Windows 7 can be virtualized,
allowing multiple operating systems to reside on a single host machine.
- Windows 7 is preconfigured to
support Hyper-V virtual machines.
Expanded security
- BitLocker-to-Go brings the encryption powers
of BitLocker to portable storage devices such as USB drives and external
storage devices.
- Preinstalled drivers let your
Windows 7 machine “read” most biometric devices.
- App-Blocker lets IT administrators
easily control the applications individual users can access.
- Windows Access Center replaces Vista’s Security
Center. The Access Center provides security alerts and gives you the
tools to take care of problems and system maintenance in one convenient
location.
- Geo-tracking will broadcast the
position of your computer to location-aware applications such as mapping
programs.
Simple device management
- Device Stage is a plug-and-play app that
will recognize portable devices when connected to a computer, and then
provide you with only the relevant menus and options needed to manage the
device.
New remote access methods
- BranchCache provides branch-office users
quicker access to files stored on central file servers in the main office.
- Direct Access gives mobile users remote
access to resources without requiring the use of a VPN.
Computer History (Time line)
The following is a timeline of some
significant events in computer history. It is not meant to be complete, just a
representation of some of the major landmarks in computer development: 1617
John Napier creates “Napier’s Bones,” wooden or ivory rods used for
calculating.
1642 Blaise Pascal introduces the Pascaline digital adding machine.
1822 Charles Babbage conceives the Difference Engine and later the Analytical
Engine, a true generalpurpose computing machine.
1906 Lee De Forest patents the vacuum tube triode, used as an
electronic switch in the first electronic computers.
1937 John V. Atanasoff begins work on the Atanasoff-Berry Computer
(ABC), which would later be officially credited as the first electronic
computer.
1943 Alan Turing develops the Colossus, a secret British
code-breaking computer designed to decode German secret messages.
1945 John von Neumann writes “First Draft of a Report on the EDVAC,”
in which he outlines the architecture of the modern stored-program computer.
1946 ENIAC is introduced, an electronic computing machine built by
John Mauchly and J. Presper Eckert.
1947 On December 23, William Shockley, Walter Brattain, and John
Bardeen successfully test the point-contact transistor, setting off the
semiconductor revolution.
1949
Maurice Wilkes assembles the EDSAC, the first practical storedprogram computer,
at Cambridge University.
1950
Engineering Research Associates of Minneapolis builds the ERA 1101, one of the
first commercially produced computers.
1952
The UNIVAC I delivered to the U.S. Census Bureau is the first commercial computer
to attract widespread public attention.
1953
IBM ships its first electronic computer, the 701.
1954 A
silicon-based junction transistor, perfected by Gordon Teal of Texas Instruments,
Inc., brings a tremendous reduction in costs.
1954
The IBM 650 magnetic drum calculator establishes itself as the first
massproduced computer, with the company selling 450 in one year.
1955
Bell Laboratories announces the first fully transistorized computer, TRADIC.
1956
MIT researchers build the TX-0, the first general-purpose, programmable computer
built with transistors.
1956
The era of magnetic disk storage dawns with IBM’s shipment of a 305 RAMAC to
Zellerbach Paper in San Francisco.
1958 Jack Kilby
creates the first integrated circuit at Texas Instruments to prove that
resistors and capacitors can exist on the same piece of semiconductor material.
1959 IBM’s 7000 series
mainframes are the company’s first transistorized computers.
1959 Robert Noyce’s
practical integrated circuit, invented at Fairchild Camera and Instrument
Corp., allows printing of conducting channels directly on the silicon surface.
1960 Bell Labs designs
its Dataphone, the first commercial modem, specifically for converting digital
computer data to analog signals for transmission across its long-distance
network.
1960 The precursor to
the minicomputer, DEC’s PDP-1, sells for $120,000.
1961 According to
Datamation magazine, IBM has an 81.2% share of the computer market in 1961, the
year in which it introduces the 1400 Series.
1964 CDC’s 6600
supercomputer, designed by Seymour Cray, performs up to three million
instructions per second—a processing speed three times faster than that of its
closest competitor, the IBM Stretch.
1964 IBM announces
System/360, a family of six mutually compatible computers and 40 peripherals
that can work together.
1964 Online
transaction processing makes its debut in IBM’s SABRE reservation system, set
up for American Airlines.
1965 Digital Equipment
Corp. introduces the PDP-8, the first commercially successful minicomputer.
1966 Hewlett-Packard
enters the generalpurpose computer business with its HP-2115 for computation,
offering a computational power formerly found only in much larger computers.
1969 The root of what
is to become the Internet begins when the Department of Defense establishes four
nodes on the ARPAnet: two at
University of
California campuses (one at Santa Barbara and one at Los Angeles) and one each
at SRI International and the University of
Utah.
1971 A team at IBM’s
San Jose Laboratories invents the 8'' floppy disk.
1971 The first
advertisement for a microprocessor, the Intel 4004, appears in Electronic News.
1971 The Kenbak-1, one
of the first personal computers, advertises for $750 in Scientific
American.
1972 Hewlett-Packard
announces the HP-35 as “a fast, extremely accurate electronic slide rule” with
a solidstate memory similar to that of a computer.
1972 Intel’s 8008
microprocessor makes its debut.
1972 Steve Wozniak
builds his “blue box,” a tone generator to make free phone calls.
1973 Robert Metcalfe
devises the Ethernet method of network connection at the Xerox Palo Alto
Research Center.
1973 The Micral is the
earliest commercial, non-kit personal computer based on a microprocessor, the
Intel 8008.
1973 The TV
Typewriter, designed by Don Lancaster, provides the first display of
alphanumeric information on an ordinary television set.
1974 Researchers at
the Xerox Palo Alto Research Center design the Alto, the first workstation with
a built-in mouse for
1974 Scelbi advertises
its 8H computer, the first commercially advertised U.S. computer based on a
microprocessor, Intel’s 8008.
1975 Telenet, the
first commercial packetswitching network and civilian equivalent of ARPAnet, is
born.
1975 The January
edition of Popular
Electronics features
the Altair 8800, which is based on Intel’s 8080 microprocessor, on its cover.
1975 The visual
display module (VDM) prototype, designed by Lee Felsenstein, marks the first
implementation of a memory-mapped
alphanumeric video
display for personal computers.
1976 Steve Wozniak
designs the Apple I, a single-board computer.
1976 The 5 1/4''
flexible disk drive and disk are introduced by Shugart Associates.
1976 The Cray I makes
its name as the first commercially successful vector processor.
1977 Tandy Radio Shack
introduces the TRS-80.
1977 Apple Computer
introduces the Apple II.
1977 Commodore
introduces the PET (Personal Electronic Transactor).
1978 The VAX 11/780
from Digital Equipment Corp. features the capability to address up to 4.3GB of
virtual memory, providing hundreds of times the capacity of most minicomputers.
1979 Motorola introduces the 68000 microprocessor.
1980 John Shoch, at
the Xerox Palo Alto Research Center, invents the computer “worm,” a short
program that searches a network for idle processors.
1980 Seagate
Technology creates the first hard disk drive for microcomputers, the ST-506.
1980 The first optical
data storage disk has 60 times the capacity of a 5 1/4'' floppy disk.
1981 Xerox introduces
the Star, the first personal computer with a graphical user interface (GUI).
1981 Adam Osborne
completes the first portable computer, the Osborne I, which weighs 24lbs. and
costs $1,795.
1981 IBM introduces
its PC, igniting a fast growth of the personal computer market. The IBM PC is
the grandfather of all modern PCs.
1981 Sony introduces
and ships the first 3 1/2'' floppy drives and disks.
1981 Philips and Sony
introduce the CD-DA (Compact Disc Digital Audio) drive. Sony is the first with
a CD player on the market.
1983 Apple introduces
its Lisa, which incorporates a GUI that’s very similar to the one first
introduced on the Xerox Star.
1983 Compaq Computer
Corp. introduces its first PC clone that uses the same software as the IBM PC.
1984 Apple Computer
launches the Macintosh, the first successful mouse-driven computer with a GUI, with
a single $1.5 million commercial during the 1984 Super Bowl.
1984 IBM releases the
PC-AT (PC Advanced Technology), three times faster than original PCs and based on
the Intel 286 chip. The AT introduces the 16-bit ISA bus and is the computer
all modern PCs are based on.
1985 Philips
introduces the first CD-ROM drive.
1986 Compaq announces
the Deskpro 386, the first computer on the market to use what was then Intel’s
new 386 chip.
1987 IBM introduces
its PS/2 machines, which make the 3 1/2'' floppy disk drive and VGA video
standard for PCs. The PS/2 also introduces the MicroChannel Architecture (MCA) bus,
the first plug-and-play bus for PCs.
1988 Apple cofounder
Steve Jobs, who left Apple to form his own company, unveils the NeXT.
1988 Compaq and other
PC-clone makers develop Enhanced Industry Standard Architecture (EISA), which
unlike MicroChannel retains backward compatibility with the existing ISA bus.
1988 Robert Morris’s
worm floods the ARPAnet. The 23-year-old Morris, the son of a computer security
expert for the National Security
Agency, sends a
nondestructive worm through the Internet, causing problems for about 6,000 of
the 60,000 hosts linked to the network.
1989 Intel releases
the 486 (P4) microprocessor, which contains more than one million transistors.
Intel also introduces 486 motherboard
chipsets.
1990 The World Wide
Web (WWW) is born when Tim Berners-Lee, a researcher at CERN—the high-energy physics laboratory in Geneva— develops
Hypertext Markup Language (HTML).
1993 Intel releases
the Pentium (P5) processor. Intel shifts from numbers to names for its chips
after it learns it’s impossible to trademark a number. Intel also releases
motherboard chipsets and, for the first time, complete motherboards as well.
1995 Intel releases
the Pentium Pro processor, the first in the P6 processor family.
1995 Microsoft
releases Windows 95, the first mainstream 32-bit operating system, in a huge
rollout.
1997 Intel releases
the Pentium II processor, essentially a Pentium Pro with MMX instructions
added.
1997 AMD introduces
the K6, which is compatible with the Intel P5 (Pentium).
1998 Microsoft
releases Windows 98.
1998 Intel releases
the Celeron, a low-cost version of the Pentium II processor. Initial versions
have no cache, but within a few months Intel introduces versions with a smaller
but faster L2 cache.
1999 Intel releases the
Pentium III, essentially a Pentium II with SSE (Streaming SIMD Extensions)
added.
1999 AMD introduces
the Athlon.
2000 Microsoft
releases Windows Me (Millennium Edition) and Windows 2000.
2000 Both Intel and
AMD introduce processors running at 1GHz.
2000 AMD introduces
the Duron, a lowcost Athlon with reduced L2 cache.
2000 Intel introduces
the Pentium 4, the latest processor in the Intel Architecture 32-bit (IA-32)
family.
2001 Intel releases
the Itanium processor, its first 64-bit (IA-64) processor for PCs.
2001 The industry
celebrates the 20th anniversary of the release of the original
IBM-PC.
2001 Intel introduces
the first 2GHz processor, a version of the Pentium 4. It took the industry 28
1/2 years to go from 108KHz to 1GHz, but only 18 months to go from 1GHz to 2GHz.
2001 Microsoft
releases Windows XP Home and Professional, for the first time merging the
consumer (9x/Me) and business (NT/2000) operating system lines under the same
code base (an extension of Windows 2000).
Friday, August 30, 2013
CMOS
Computer starts, its system attributes—stored in the CMOS RAM—are read by the BIOS. BIOS then uses those attributes during normal system operation. It is vitally important that the correct settings be used when configuring a system.
BIOS and CMOS RAM are not the same thing, although the two are intimately related. BIOS refers to the firmware instructions located on the BIOS ROM, and CMOS refers to the low-power RAM that is holding the system’s setup parameters. BIOS reads the CMOS RAM into memory at start time, and provides the “setup” routine that allows you to change the contents of CMOS, but the CMOS RAM/RTC device is a totally different IC.
ENTERING CMOS SETUP
The configuring of CMOS setup is to launch the setup utility. BIOS manufacturers are rarely consistent when it comes to accessing the setup utility. we launch Setup in the first few moments after the system boots—a note on the display will usually indicate the correct key or key combination such as:
Press <F1> to enter Setup...
BIOS/SYSTEM KEY OR KEY SEQUENCE
AMI BIOS <Del> key during the POST
Award BIOS <Ctrl>+<Alt>+<Esc>
DTK BIOS <Esc> key during the POST
IBM PS/2 BIOS <Ctrl>+<Alt>+<Ins> after <Ctrl>+<Alt>+<Del>
Phoenix BIOS <Ctrl>+<Alt>+<Esc> or <Ctrl>+<Alt>+<S>
ALR PC <F2> (for PCI systems)
or <Ctrl>+<Alt>+<Esc> (for non-PCI systems)
Compaq PCs <F10>
Gateway 2000 PC <F1>
Sony PC <F3> while the PC is starting (you see the Sony logo), then hit <F1>
THE CMOS MAP
standard 128-byte ISAcompatible CMOS is divided into four fairly distinct sections: 16 bytes of real-time clock data (00h–0Fh), 32 bytes of ISA configuration data (10h–2Fh), 16 bytes of BIOS-specific configuration data (30h–3Fh), and 64 bytes of extended CMOS data (40h–7Fh). Additional CMOS
RAM is typically used as the ESCD.
Sunday, August 25, 2013
BIOS ERROR MESSAGES
- BIOS ROM checksum error—system halted The checksum of the BIOS code in the BIOS chip is incorrect—this is a fatal problem, indicating the BIOS code might have become corrupt. They will need to replace the motherboard BIOS before the system will initialize.
- CMOS battery failed The CMOS battery is no longer functional. Need to replace the CMOS battery.
- DMA bus time-out A device has driven the bus signal for more than 7.8 microseconds. This might be a random fault, but chances are that a device in the PC has failed. Try removing expansion devices first. Otherwise, replace the motherboard.
- Cache memory bad, do not enable cache POST has determined that your cache memory is defective. Do not attempt to enable the cache in your system.
- DMA error A serious fault has occurred in the DMA-controller system of your motherboard. In virtually all cases, the motherboard will have to be replaced.
- INTR #1 (or INTR #2) error A serious fault has occurred with your interrupt controller on the motherboard. In virtually all cases, the motherboard will have to be replaced entirely.
- Primary input device not found: The primary input device, such as the keyboard or mouse or other device if input is redirected, could not be found. Check the installation and configuration of all your input devices. Be sure that the input devices are also enabled in CMOS setup.
- PCI IRQ conflict: Two devices requested the same IRQ, resulting in a conflict. Try freeing the IRQs needed to allow both devices to be configured properly.
Saturday, August 24, 2013
BIOS Features
PC is constantly advancing in CPU’s, chipsets, memory, video, drives, etc. The key features that are included in a BIOS.
- CPU support BIOS should support a rich range of CPUs, preferably from such CPU makers as Intel and, AMD.
- Chipset support The BIOS should support the latest chipset families. Chipset support is crucial because it allows motherboard designers to implement other features, such as USB and advanced memory.
- Memory support The BIOS should be able to auto-size and support the most modern forms of memory. Memory error checking (parity and ECC) should also be supported.
- Drive support The BIOS must support large SATA/EIDE/Ultra-ATA hard drives with very fast data-transfer modes, such as PIO Modes and Ultra DMA.
- ACPI/APM support The BIOS should be fully compliant with the Advanced Configuration and Power Interface (ACPI) specification , and supports APM BIOS specifications through version 1.2. Power management is important for mobile systems, and is widely used in desktop/tower systems to reduce energy waste.
- Boot versatility support The BIOS should be able to boot from a number of different drives, and include the BIOS Boot Specification for Initial Program Load (IPL) devices. This currently supports booting from up to four IDE/EIDE/SATA drives (including CD-ROM drives), SCSI drives, USB and network cards.
- Plug-and-Play support The BIOS must detect and configure PnP devices during POST.
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