I'm attempting to install Microsoft Office 2007 Enterprise, and during installation an error message appears that says something like: error - cannot update file/folder at c:\windows\pchealth, installation cannot proceed.
Then the installer rolls back everything and I get mad.

Does anyone have any suggestions? How do I authorize the folder? This has been happening for a while and a solution will make me very happy inside.
Just thought I'd also mention this as it may have some bearing on why this is happening: When I purchased my computer it came with Windows XP Media Center, but a virus plagued my system and my hard drive became corrupted and I had to reinstall windows. Unfortunately, I didn't have the installation disk and ended up installing a non-Media Center edition on a disk from my roommate. I don't know if this would affect anything...but just thought I'd put it out there.