Benn,
First try:
Run (outside VFP) c:\Program Files\Microsoft Visual FoxPro 9\Visual FoxPro 9.0 Professional - English\deletetemp.exe
Then Start VFP and see what happens.

If it didn't works:
Uninstall VFP 9, Delete Folder Program Files\Microsoft VFP 9
Delete VFP9*.* from Program Files\Common Files\Microsoft Shared\VFP
Delete c:\Documents and Settings\YourUserName\Application Data\Microsoft\Visual FoxPro 9\ folder
With REGEDIT find and delete all keys related to VFP9 in registry (be careful :o)))
Install it again.
If it didn't run again, change the date of your computer to a date before 01 april 2005 (i.e 30.03.2005)
Run VFP Help->About and see the version it must be 09.00.0000.2412 (this is my VFP 9 version)
If it shows BETA or something elese return your package to reseler and asks him to deliver the right one.