Ah, but that's the problem. Certain floors are still being updated on the newer version of Windows. We're going from Vista to Windows 7. I need to know which you're under to actually help you.
Bring up the "Run" dialog box by clicking on Start, then Run. Alternatively, you can bring up the dialog box using a keyboard shortcut by holding down the Window key and pressing R.
In the edit box next to "Open:" type "winver" without the quotes and then hit enter.