My computer monitor suddenly went black with only my mouse cursor showing. The computer was rebooted. And after with the windows login, the monitor was black again. I did a ctrl-alt-delete and was able to access task manager. I shut down Explorer.exe. Then went to Task Run and started it again. Still just a black screen. I am running a Dell XPS 435mt with Vista Windows Home Premium. I don't think it's a video issue because I did some diagnostics tests, and everywhere else I can see the screen, except windows. Thanks in advance for any help. Also when attempting to boot in safe mode it has hung after "Loaded: \Windows\system32\drivers\crcdisk.sys" with only a "Please wait..." message.