Host: $ uname -rmiv 2.6.21-1.3228.fc7 #1 SMP Tue Jun 12 14:56:37 EDT 2007 x86_64 x86_64 I have installed win2k as a guest OS using the instructions in here: http://kvm.qumranet.com/kvmwiki/HOWTO I did all of the above as non-root, and all works except for the warning that I get on the console: Could not configure '/dev/rtc' to have a 1024 Hz timer. This is not a fatal error, but for better emulation accuracy either use a 2.6 host Linux kernel or type 'echo 1024 > /proc/sys/dev/rtc/max-user-freq' as root. Also, the clock in the guest OS slowly drifts away / delayed, probably as a result of the above. Now if : 1) I run qemu ( as above ) via sudo or as root ... or 2) type 'echo 1024 > /proc/sys/dev/rtc/max-user-freq' as root, but then run qemu as non-root In both instances, the host OS ( F7 ) completely hangs. The only way I could run qemu is as non-root. Any ideas ? John