With Avast installed, Win7 64bit crashes when starting Virtual PC in VPC 2007

[avastmobile2]

I recently uinstalled Avast Free from my PC since it was causing my NIC to reset itself every few minutes. It took me a while to figure out it was Avast that was causing it because I never experienced any problems with Avast before. I then noticed there was a new version of Avast Free so I installed that. I did not experience any problems with my network so I was happy again. But today I started Virtual PC 2007 and whenever I tried to start a Virtual Machine, Win7 would hang and my only option was to reboot my PC. Again it took me a while to figure out what was causing this, but as it tuns out, it was Avast (again). If I uninstall Avast, VPX 2007 runs perfectly. Installing Avast and VPC 2007 hangs whenever I try to start a Virtual Machine.

So what could be wrong? Any tips getting Avast and VPC 2007 working together?

Thanks in advance.

[Eddy]

Disable hardware VM and see if that solves it.

[avastmobile2]

Thank you for your reply! Had tried that already. Didn't make any difference.

[Eddy]

Also tried with the the behavior shield disabled ?
Also tried with hardware acceleration disabled ?

[avastmobile2]

Also tried with the the behavior shield disabled ?

Yes (even disabled all shields).

Also tried with hardware acceleration disabled ?

Yes.

Both made no difference.

[avastmobile2]

Anyone any other ideas?

[avastmobile2]

Also tried with hardware acceleration disabled ?

I thought you meant disable hardware acceleration in VirtualPC (which made no difference). I was unaware there was a "Hardware Assisted Virtualization" option in Avast. I disabled that and now I can start my Virtual Machines just fine!

Is this related to this?