digital signature winload.exe not recognized

Hi, I purchased your recovery CD for my Windows Vista which suddenly developed a partition boot problem and it appears to have almost fixed the problem, but am now getting "Your digital signature for this file couldn't be verified" "file:\windows\system32\winload.exe..... how do I finish from here? Thanks!!!
windows\system32\winload.exe digital signature invalid:

I had this problem and I ended up fixing it by using the windows 7 install disk to erase and recreate the system partitions (C: and that automatic 100mb system boot partition) , then I copied my backup partition over the fresh install.

The problem didn't go away by simply deleting the partitions, and restoring with the backups, so it must have been something on the master boot block? Not sure what caused all this in the first place.

Hope this helps. If anyone has a simpler solution, please share.