What I don't get is that the last version of Avast (version 4.8 I believe) had a self defense feature, as I recall, and system restore worked just fine back then on my XP system. Problem is just with Avast5 Free AV on the new Win7x64 system.
The two times I have used System Restore with my new pc running Win7 x64, my system (Avast and Win7 itself) became totally unresponsive, rendered black screens at reboot, and I was forced to consider trying a recovery using my "out of box, as shipped" restore disks when the pc. But all of a sudden the pc began to respond to keyboard/mouse input. I don't use imaging software. I just have backup disks and full system image created with Win7 internal setup for this when I first bought the pc and got all my software installed and set up (both of which worked fine I might add). Nothing short of uninstalling Avast5 resolved. Reinstall worked fine until the second System Restore and then "deja vu" all over again.
I just wish the developers could locate and correct this problem soon, so I can reinstall and get back to using Avast5 AV, the best AV out there IMHO. I don't want to have to "remember to disable self-defense feature of Avast" before using System Restore. And I don't ever want to crash my system like the last two times I did use System Restore. SIGH