Checksum

If I leave the aforementioned lptop off mains power and the battery runs down, I get the error message that there was a CMOS checksum error. If I press F1, then the laptop boots up but time/date is reset. On desktops, I'd guess that this means the CMOS battery needs replacing. All my Googling...

When I switch on my laptop I get a blank black screen with the words at the top .."The file is possibly corrupt. The file header checksum does not match the computed checksum." Any ideas on what it means and how to correct it please?

Hello, I have a Sony that first gave the dreaded green screen with text and would not boot. Now I get the message "The file is possibly corrupt. The file header checksum does not match the computed checksum" Is there a fix for this? Mark Chapman hservant72@gmail.com

Hello, I took my laptop in for repairs because the date and time, system checksum cmos bad -defaults configs used kept coming up i am not computer savvy and do know how to change date and time but i dont know how to change defaults configs without messing up laptop can use computer after...

i cant boot to cd i cant get f8 just get the file header checksum does not match the computed checksum, have tried new hdd different ram and tried using a usb external drive