Resolving “STOP ERROR 0x0000007f” Windows 2003/2008 Guest on KVM

When running Windows 2K3/2K8 guests on top of KVM Hypervisor, I experienced occassional bluescreen glitches. The guest operating system needed rebooting. This issue happens across different physical host environments, all of them enterprise-grade (i.e. RAM with ECC correction). It also happens across KVM Versions ranging from 72 (debian lenny default) to qemu-kvm 0.11.1 (ubuntu karmic default).

stop0x0000007f kvm windows bsod

This also seems to happen independently from optimization settings like virtio drives or network devices.

Resolution:

Update the guest OS to the current Service Pack  (at least W2K3 SP2 / W2K8 SP2). After the update, the error may happen again, especially during shutdown. But after rebooting, the system should remain stable.