If you try to install but it is not complteted it is very possible that remanants of the install remain, and will prevent future installs.
There is software, such as ccleaner that will remove the remnants, but I find this procedure to be the best
Make a system restore from before the first install attempt.
Then make sure that your Vista has all the required SPs and updates.
Make sure that your computer has the required specifications (memory etc)
Then try to install again, after a reboot. System Restore - How to
If your husband has a new computer, I doubt if its Vista. If it is Seven try test for compatiblity. http://www.microsoft.com/windows/com...s/default.aspx