I am running VMWare Player 5.0.1 on Windows 7 Ultimate 64-bit. Just built the computer, 32GB RAM, Intel Core i7-3750K processor, so it's got plenty of power. Quite often, when I start up one of my VMs or go back to a VM that's already open, the VM guest will seem to freeze and I can't even move the mouse outside of the VM window - not even Ctrl+Alt works. Usually I can do Ctrl-Alt-Del however to get to task manager, but even then I can't scroll and select properly to shutdown VMWare Player. I usually just have to wait a couple of minutes until it unfreezes. It seems to work better after a reboot (of the host desktop). I have more than enough RAM free and the CPU isn't pinned either. Anyone got any ideas of what I can look for to troubleshoot this? The Windows Event Logs show nothing useful. Thanks!!!