I made a big mistake. I meant to remove one registry key: HKEY-CLASSES-ROOT\CLSID\{83DE62EO-5805_11D8-9B25_00E04C60FAF2} Instead I removed the entire file: HKEY-CLASSES-ROOT\CLSID. So, now when I boot up my computer all I get is the Windows XP logo. Windows won't load. I've tried rebooting into SAFE MODE, SAFE MODE WITH COMMAND PROMPT, LAST KNOWN GOOD CONFIGUATION. If only I'd found this site before I transgressed! Can anyone help me, please.