My wife's computer has a message Stop: c0000221 {bad image checksum} The image kerne132.d11 is possibly corrupt. The header checksum does not match the computed checksum. I do not know what to do. Can someone help me fix this problem?

Check this page for info, don't worry about method 3 unless you have just installed windows
"Bad Image Checksum" Error When You Upgrade to Windows XP (http://support.microsoft.com/kb/326687)