Hi Diane

I don't think that WindowBlinds or skins have anything to do with the instalation of programs. It must be something else. I never had this problem.
The only thing I can suggest, is to put a fresh copy of Windows XP with a fresh format of your Hard Disk, after you have back-up your important files, e-mail addresses, favorites, your works etc. with the help of "Files and Settings Transfer Wizard". The all process is only one hour