It locked up again. I had a shortcut to metro apps on my desktop, which I removed. Below is a reference to the shortcut. I had created it as I couldn't remember at the time, what the key combination was to bring up the Metro menu. Also I do have a GE Force GTX 460 SE2, which is using Windows drivers. I am downloading the current ones from Nvidia now (not the beta ones) 1. Right-click (or touch and hold) on the desktop, select New, and choose Shortcut. 2. Copy and paste the following into the location field: %windir%\explorer.exe shell:::{4234d49b-0245-4df3-b780-3893943456e1} 3 Select Next. 4. Type in a name, like “All Apps”, and select Finish. That's good. Tell me that it solves your problem. Although, this shouldn't ever cause hard lockups. Do you use NVIDIA beta drivers?