Help with Windows Installer in Windows 7 (64bit)

Can anyone help me with this! I've been searching the internet for ages now and can't find a fix that works! I've tried deregistering and registering the msiexec file and stopping and starting the windows installer. I can't find anywhere to download a new one! Any ideas!

The issue is that we can't open programs or do updates. So internet explorer, itunes, excel etc and I can't do any windows updates either. The only reason I've narrowed it down to the windows installer is that when trying to open excel I get a 1719 error.

geek_thejoeygirl, May 13, 8:22 pm

geek_gibler, May 13, 8:25 pm