If the workplace computer is running NT or 98 then get a copy of the install you used on the workplace computer, as the install you downloaded is likely damaged, it happens, the biggest problem is one of the link Dlls is missing on the front end, too much work finding which one, and likely it's in compressed , if you have a program that can open it , you can pull the frontend off the work install and replace the front end on the download. But be sure to read carefully the error messages you aregetting when you attempt to install it now , as there are times when your configuration can alter installs , and damage your machine if certain installs are forced.
Good luck
P.S. download it again and make sure you are getting the version for 98,and NOT Linix or Mac, as certain download sites are somewhat confusing as to which version you are getting