As a rule of thumb, NEVER delete (or modify, unless you really know what you're doing) any of the files in the c:\windows directory or subdirectories. I'm pretty sure uninstall data files will either be in c:\users\{your user name}\appdata somewhere, or maybe c:\program files. But c:\windows should only be for critical system files. Deleting things from here will likely crash your computer and require a complete reinstall of your OS. Is there any particular reason you think these files might be old uninstall data file? Personally, I don't even have any files named anything similar to that in c:\windows, so I don't know what they would be.