I just replaced Office 2000 SR-1 with Office Home & Student 2007.
Unfortunately, I didn't have the original install disc for Office 2000 SR-1
so I force uninstalled it (just the program files).

The symptoms I'm getting are with two programs, Outlook Express and Mathcad.
With OE every time I send an e-mail I get an error message from Windows
Installer saying it is trying to configure Office 2000 SR-1 (the e-mail goes
through by the way) and with Mathcad I get a message from my anti-virus
program saying it has quarantined a ~f1d055.tmp file and the program fails
to open. Also, when I list programs on my machine Office 2000 SR-1 still
comes up. I suspect these problems are related to the registry and would
like some advice as to what I need to change there. Thanks in advance.