Work ((top)) - Windows Longhorn Qcow2

Longhorn is highly unstable. and use snapshots . Many builds will not complete installation on any hypervisor – that is normal. The most stable builds for QEMU are Build 4074 (pre-reset) and Build 6001 (post-reset, close to Vista RC1).

If you are trying to get a Longhorn QCOW2 image working, here is the "secret sauce" often used by hobbyists on sites like ComputerNewb Wiki : windows longhorn qcow2 work

(Adjust the date in the -rtc flag to match your specific build.) 5. Converting Existing Builds to QCOW2 Longhorn is highly unstable