I followed this guide: http://buildasteambox.blogspot.com/2013/02/turn-windows-7-pc-into-dedicated-steam.html?showComment=1376023934498&m=1#c214566212631467399 (edited login background, edited registry, turned off login password, etc.) on windows 7 64 bit and now when I turn on my computer and get to where the login screen would be, the screen just goes black with a cursor. I can't open task manager or anything. System repair finds no errors, I have system restore turned off so that's not an option, idk what to do. Also, my computer professor lent me a windows 7 disc and key when i built my PC so I can't pop it in and reinstall either. Help please?