Problem: Only two sockets show up in Windows.
Fix: go to manual topology in the CPU section of Virt-Manager and have at most 2 sockets and use multiple cores to get more CPUs in Windows.
Why: Windows only supports two CPU sockets, so any more than two sockets are ignored by Windows
Problem: No sound from guest
Fix: Go to application volume and set it to the max level
Why: For some reason pluseaudio sets audio levels for spice client to very low level.