Hi. I downloaded and installed the Windows 7 beta yesterday. It was working fine until I shut it down. When I restarted and logged back in, I just had a black screen with the words: Windows 7 For testing purposes only. Build 7000 in the bottom right corner. The only thing on screen was a single Windows explorer window that allowed me to open all of my files. I've tried re-doing the upgrade process, but nothing works. It says that I have to restart Windows to install important updates, but I've got no possible way to restart it so that the updates can get installed. I tried doing a system restore, but it said it couldn't do that because the OS was corrupted in the C: drive. I had it schedule a disk check for when it restarted, but after I tried to restart, it didn't do anything. I'm desperate for some help. Please respond soon, this is a major problem that I'd like assistance with soon.