Yet it started up to the new Windows 7 installation with no error message or offer to Roll Back?
Do you have the files all backed up and program installers and Product Keys for Office, Quickbooks, etc. available?
You can tell your boss you are getting assistance for the recognized top resource on the web for Clean Installing and Reinstalling Windows 7.
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Do you want to keep this installation since there is no rollback option without windows.old?