Checksum

Hi John,
Since I have not seen the actual message, I have to give the possiblities.
If it says the "checksum of the file" is incorrect , then the problem is a corrupt file. Reload that file.

The checksum is the way the Operating System ( Windows, Linux, DOS, etc.) detects changed bits.
It simply uses an algorithim to add up the value of all of the bytes in a file and compares them to the number originally established as correct.

If a list of the checksums is corrupt, it is time to start looking for a virus.
Some antivirus programs keep this list to look for changes.
(Viruses can attach themselves to files, and change the checksum, so that it looks like nothing is wrong, to Windows.)
So, because of this subtle difference, read the error message carefully, and then take action.
Regards, Chris

ROM Checksum Error

Explanation: Some peripheral devices and expansion cards contain executable code stored in a ROM. The ROM has a checksum value in it that is used as a double-check by the BIOS to ensure that the code has been corrupted before the BIOS tries to use the device. This error message is generated when the BIOS detects a mismatch between the stored checksum value and the one it calculated at boot time by looking at the expansion peripheral's ROM code. A four-digit address may be included in the message to indicate the address of the failed peripheral.

Diagnosis: There is a problem with one of the peripherals, or possibly the video card or motherboard.

Recommendation:

Troubleshoot expansion cards.
Troubleshoot the video card.
Troubleshoot the motherboard.