See if you can download, run in Safe Mode, & save logs using Rootrepeal.
http://ad13.geekstogo.com/RootRepeal.rar
You'll need to Unrar the compressed file to run the executable.
Post the log back here.
Another options is to remove the hard drive, install it (temporarily) in a clean computer as a secondary or slave drive and run anti-virus and anti-spyware scans on it. You may have a hidden rootkit virus that keeps shutting down your programs (even in safe mode), so scanning it in another computer will probably help.
Start by downloading & running Rootrepeal first to see if hidden processes & services & files are active.
Hope that helps.
Zyldar