|Firstly, Word 2000 should run fine on XP (as you previously found). As Word is either corrupted or missing, XP has associated documents with WordPad - which is why they look all wrong. It is unlikely that there is any problem with the document files themselves.|
Best guess is that the Virus screwed things up, although maybe Word got messed up during repair. Whatever, it might prove tricky to sort out.
Firstly go to Control Panel/Add-Remove programs and make sure there is no entry still existing for Microsoft Office. If so uninstall it and try your CD once more.
If there is no entry there, see next post for method to remove it.
Another possibility is that Windows Installer is corrupted. You could try downloading the latest version and installing it from the link on this page:
If none of this works and nobody comes along with any other ideas, you could consider "Open Office" which is free. Here's the link:
Its "Writer" is very similar to Word and you can set it to open MS doc files and also save to them. Same goes for their Excel equivalent (Calc).
Short of reformat, the above is about all I can offer.
Long Range Golfer