Reducing the size of C:\Windows\Installer

[darael]

Is there a way of reducing the size of the C:\Windows\Installer folder? I am fixing a machine whose Installer folder is nearly 100gb in size - consuming more than half of the harddrive.

I'm aware of the Windows Installer Cleanup Utility, but have used this on my own machine with unsatisfactory results - ie: many programs had to be reinstalled...

Help!

 

[darael]

Unfortunately CCleaner won't clean the folder out - I just want the safe to delete files gone, and perhaps free up 80gb!

 

[darael]

No other ideas then?