If you are talking about running Windows specifically under KVM, then switch your display from VNC to Spice, change the video adapter to QXL and inside the Wind

If you are talking about running Windows specifically under KVM, then switch your display from VNC to Spice, change the video adapter to QXL and inside the Windows VM install spice-tools from http://www.spice-space.org/download/binaries/spice-guest-tools/spice-guest-tools-0.74.exe http://www.spice-space.org/download/binaries/spice-guest-too... This alleviates some of the problems you are referring to.