Client causes grey screen on my laptop if I reboot a remote computer

Ongoing problem here, I reboot the remote computer and my local computer client goes to a grey screen which I cannot exit from.  It took me about 30 minutes yesterday to get my laptop to start responding again.  I could ctrl-Tab and see other windows but whichever one I selected I would still be stuck at a grey screen.  I could control alt delete and select task manager but I would be stuck with the grey screen and never see the task manager.