A new battery was installed when I powered it up Windows XP was shown then I got a Checksum Blue Screen. I tried to open it up in every way asked but still have the blue screen with the message above.
In order to understand what a checksum error is, it is important to first learn what a checksum is. A checksum is a redundancy check during a computer's start up process, which makes sure that the computer's data is intact and unhampered. The data is scanned and tested for accuracy, either based on how well it relates to data elsewhere or based on previous data that was stored on the same computer. Essentially, all of the bits of data in a particular document or file are added up and a number or hash is created. This number or hash can then be compared to the number or hash generated from the same file on another person's computer or at a previous time on the same computer. Although a checksum error can occur at any time while a computer is comparing data, it is most commonly present during a computer's startup procedure. During a computer's start up processes, the BIOS settings, which are stored in a CMOS memory chip, are computed and then checked against the previous value. If the computed values do not match exactly, the computer warns the user with a checksum error message that the data may have been changed or corrupted between start up cycles. All BIOS programs present a different error and therefore will either continue with booting or refuse to boot until the problem is corrected. Depending on the type and the severity of the error generated, there may be one of a variety of ways to rectify the issue. The most common cause of a checksum error during the startup process is a faulty battery that is not providing sufficient power to the motherboard when the computer is off. However, motherboard malfunctions and viruses can also contribute to checksum errors. Another type of checksum error may occur with any program at any time. It is usual for many programs to now provide checksum information when that program is downloaded. Using a checksum program or MD5 hash checker, a user can quickly compare the checksum of a downloaded program with the checksum that the software developer provides. This is a common way to make sure that users are downloading the proper program and that no data was corrupted during the download process. Checksum errors originating from download errors can easily be corrected by re-downloading the problematic program.
When does a Checksum Error Occur?
Other Types of Checksum Errors
if you have a windows disk you might try doing a repair from disk
SOURCE: Blue Screen
Try re-starting your pc and tapping the F8 while it starts up and try getting in through "Safe Mode". If you can get in click "Start", "Run" and type "cmd". Hit OK. At the dos promt type "sfc" and let windows check your files.
SOURCE: blue screen of death
It is a problem with either your memory manager or a dll file most likely. If you have an install disk run the memory test on it. This may be called the WIndows memory diagnostic tool or something similar. Often when it reboots it will come up fine again and keep on doing so. If its a corrupt dll you will need to repair windows using an XP system disk or recovery CD/DVD. Hope this helps.
SOURCE: I am gettin a blue screen that says Stop c00000221
If you've encounter with this issue, this issue the same with your BIOS password you can easy access the BIOS by reset the CMOS battery and jamper.
The checksum error refer in CMOS memory that is maintained while the PC is powered off by
a small battery, which is attached to the motherboard. If you remove
this battery, all CMOS information (including the BIOS password) will
be lost. You will need to re-enter the correct CMOS setup information
to use the machine. The machines owner or user will most likely be
alarmed when it is discovered that the BIOS password has been deleted.
On some motherboards, the battery is soldered to the motherboard,
making it difficult to remove. If this is the case, you have another
alternative. Somewhere on the motherboard you should find a jumper that
will clear the BIOS. If you have the motherboard
documentation, you will know where that jumper is.
If not, the jumper
may be labeled on the motherboard. If you are not fortunate enough for
either of these to be the case, you may be able to guess which jumper
is the correct jumper. This jumper is usually standing alone near the
battery. If you cannot locate this jumper, you might short both of the
points where the battery connects to the motherboard.
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