HELP! The mysterious problem.....any ideas?

[BarTopDancer]

Originally Posted by €uroMeinke

I tried this one, but the system restore is returning an error message and the system info app doesn't run either.

Zoinks!

There is a chance NAV is conflicting with AVGFree. Turn off NAV auto-protect, disable NAV completely if you can and run a virus scan with AVG.

I seriously recommend completely uninstalling NAV (though it's so deeply integrated into your system that you're going to have to go digging to get out bits and peices of it) and just use AVGFree.