System (SP2) has been running fine for weeks. This morning my Norton Live Update wouldn't install the latest update. After further checking, I found NO files will install. I get error: "xxxx is not a valid Win32 application". This holds true for .exe and .msi. programs. Copied an old .exe file to see if it was a corrupt d/l problem - nope. Nothing changed in last 2 days. Ran AdAware and Norton Anti-virus, no baddies. My Norton files are updated through the 6th, so it worked up to then. Any ideas?