TSGL: Crashed

[Ron Grant]

I have a Windows Vista HP that just crashed on me.
Was working in Explorer transferring image files from folder to folder 
when Explorer said it had to close.  It did and I rebooted.  Now all I 
get is a black screen with with the message in white letters :"The file 
is possibly corrupt. The file header checksum does not match the 
computed checksum."

I cannot get into safe mode. Cannot go to last known good 
configuration.  Cannot get system restore to start either form the BIOS 
screen or using a restore disc.

Never had this happen like this before. 
Any ideas??

TIA,  Ron Grant