Your school is teaching on VB5
Thats two generations behind!
What OS? Service pack?
As six mentioned, it could be a scratched cd. I'd consider maybe it was MSI borkign the install, but I dont' think MSI Installer existed back in the caveman days when it was popular
Hmm worst case scenario, try installing in safe mode *shrug*
What else is running when you're installing? maybe there is a file conflict, make sure there are no other apps running as they maybe using the VB5 libraries its trying to copy in.