Sudden flood of problems with vista

Hi,

I'm running Windows Vista, and my system has been fairly stable for the last few months. I got a pile of strange bugs all popping up at the same time today, and I'm stumped-

1)Windows explorer crashes periodically, especially when opening items in the control panel. The "system" "programs" tabs refuse to open at all.
2)Some applications are reporting that my CPU does not meet minimum spec, saying it has a speed of 0.0 GHz.
3)Sophos antivirus refuses to start entirely, making a virus scan difficult
4)Itunes library was reported as damaged
5)Audio does not work for some applications.

32-bit Vista
Dual Core AMD 2.41 GHz Processor
2 GB ram
Geforce 8600 GT graphics card

HJT log attached

 

Why dont you try a system restore to a few days back, go to programs, accessories, system tools, system restore, and pick another restore point.. ed