I've only had this happen a couple times, but it's happening again right now. When I re-awaken Windows from sleep, my screen stays black. I found out that by hitting Ctrl+Alt+Del my Task Manager was still running, and then by using Alt+Tab that I could switch between applications. However, whenever I switch to my desktop, the screen goes black.
I tried killing and restoring the explorer.exe process (Windows Explorer), but no luck. Any ideas? I'm hesitant to kill and restore dwm.exe (Desktop Windows Manager), but I may close and save all my files and then try that...