Resolved Windows 7 boots to cx0000135 stop error

Today I had 3 clients come to me with the cx0000135 stop error. The computers would try to startup, fail with the stop error code then try to recover windows. Sometimes the recover windows would work. One of the computers I had restored back to a previous date. These clients had a HP computer, Acer laptop and a Dell laptop. All running Windows 7.
Has anyone ran into this stop error. I just thought it was very unusual that in one day I had 3 computers with the same problem.
Thanks for any input

 

Do your clients happen to have AVG 2011 installed?
I just helped out a buddy who has Vista installed and couldn't boot to Windows, he had the same error

Apparently a bad update from AVG may be the problem
Managed to Restore his computer to before the update
They say at AVG forum it's affecting some Windows 7 64bit systems
But I can confirm it also affects Vista 64bit

Here's more info
http://forums.avg.com/ca-en/avg-free-forum?sec=theme&act=show&id=201

 

Yes they all had AVG-Anti Virus 2011. So once the system is fix it should happen again, correct. Hopefully the next update of AVG doesn't have a bug in it.
Thanks for the reply