I have tried: support microsoft /kb/947215/eng <- Can't post a website link :/ But my SID key is the same key as the key of the temporary account ending in 1001 The only diffrence is that my SID code is 1001.bak Also, there is a 1001, 1001.bak, 1003, 1004 and a 1005 SID key. 1003 to 1005 are keys form other users. But is my key supposed to be 1002 instead of 1001.bak? Maybe this causes the problem, please help me. Thanks in advance!