C:\WINDOWS\System32\DRIVERS\ShlDrv51.sys - For as long as I can remember it is from Panda, right?
So i don't see any sign of a malware in your log.
Please do a log of the hijackthis.(you can read in our rules how to do it )
I think your little problems because incompatibility. Maybe it is because of your "anti".
You should disable an active monitoring in the spybot settings- it's called TeaTimer. See how-to: http://virusinfo.info/showthread.php?t=9402