https://bugs.winehq.org/show_bug.cgi?id=40191
--- Comment #7 from François Gouget fgouget@codeweavers.com --- I have done tests with the w8 QEMU VM and they confirmed that this issue is related to single-core vs. multi-core/hyperthreading: * The tests succeed on single-core processors, * and fail if the processor has either multiple cores or hyperthreading.
With these tests I also discovered that Windows 8 (standard Home edition) will only use one processor, instead of up to two for all versions up to Windows 7.
This means that currently all Windows 8+ VMs only use a single single-core processor. I have now changed the w8 VM configuration to a single dual-core non-hyperthreading processor.
Here's the new result: https://testbot.winehq.org/JobDetails.pl?Key=20836