Hi Mity,
no clue what that issue was about - today, after reading your reply, I tried again to reproduce the error and VMware Fusion runs like a charm. Maybe that was an issue with a signature...
I attach both avastdemon.log and avastshield.log, maybe you can find the reason for this behavior. At least I found some errors like that:
scan error: 451 SCAN Engine error 2 No such file or directory
Error: '/Applications/VMware Fusion.app/Contents/MacOS/vmware', errno 12.
Please let me know if you need some further information.
By the way: I'm still running Mac OS X 10.6, my machine has about 12 GB RAM and 2 quad core CPU's. VMware Fusion is 3.12
Regards