This is just a heads-up. I tried building current qemu git today and running a win7 guest in it. Neither already installed guest (which finds new hardware and want to reboot) nor freshly installed win7 boots: it boots for the first time, next it installs drivers, but on reboot it BSODs with
STOP: 0x0000005C (0x000000000000010B, 0x0000000000000003, 0x000000000000000, 0x000000000000000) which is - according to ms docs - some HAL initialization error, maybe related to ACPI. But apparently subsequent boots works. The freshly installed win7 asked me something (even suggested to run safe mode or something like that), I told it to boot normally and it booted, and - seemingly - works since that. Still, this first-reboot-stop-0x0000005c is something I have never seen from qemu or kvm before, even very old versions worked fine. P.S. I used 32bit version of qemu userspace and 32bit version of win7 guest (so far), with 1G guest ram and -cpu host, from AthlonII host cpu, and with -smp 1. Thanks, /mjt