It look like adding "hyperv" in "features" section to guest definition helps, my Win7 VM now is running for ~12h, when without "hyperv" it was like 3-4 hour. I will test it for few days and will post here again.
<features> <acpi/> <apic/> <pae/> <hyperv> <relaxed state='on'/> </hyperv> </features> -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1308341 Title: Multiple CPUs causes blue screen on Windows guest To manage notifications about this bug go to: https://bugs.launchpad.net/qemu/+bug/1308341/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs