If there's no disk and they didn't order and pay for Office, it was a trial version that comes with every new computer. The product key on the computer is for Windows, not Office. The Office key would be on the disk's packaging. 
Hi, I recently reinstalled Vista for a friend's computer, the Dell Dimension E521. The computer had some viruses and the best way to fix things was a reinstall. The problem is, it came with Office 2007, but there is no installation disc. It didn't come with the computer, apparently. Is there a way to get one? I have the product key and the service tag to prove that they own it.
Reinstalled Vista but...