I'm not good with computers or anything but I know the basics, so here's my story. In attempt to open a file on my desktop (Specifically a maphack program that works with Diablo2, an online game. The maphack itself is harmless even in the game) a message came up saying the mother file is a hidden file in my System32 folder and it may be a trojan, this had never happened before. I went in to see it was a .exe file, cant remember the name but it started with 'M' and looked like random letters. After I deleted it no files on my computer would open. I restarted my computer, NOTHING CAME UP. I cannot open any file, or run command prompt or anything, and when my computer starts up there's nothing but a black screen and mouse cursor. I can use Ctrl+Alt+Delete and it doesn't look like any unusual programs are running. I tried safe mode, and starting from "last known settings that worked" in the Windows XP 'F8' command during startup and they didnt make any difference. This is what I know about the file: It was created on my compter January 24th. The only things i downloaded/installed since then were P2P file sharing programs, specifically Kazaa, Grokster, and Morpheus. EVERYTHING ON MY COPUTER WORKED FINE UNTIL I DELETED THE FILE FROM MY SYSTEM32 FOLDER. I'm sending this from a friend's computer and will check the tread at least daily. If anybody could give me any advice or help i'd appreciate it a lot, Thanks.