The Program has been Damaged

My Windows XP Pro 32-Bit PC was infected with malwares. And BitPro reported an error and I posted it here. I tried logging in to other profile but still received the same error message. It doesn’t matter which profile or what version of BitPro I used. I found the same problem online but the solution was to reformat my Windows. Is there any other way to resolve this?

Error!
This program has been damaged, possibly by a bad sector of the hard drive or a virus. Please reinstall it.
