It was my Folder C:\User\***\*.*
I made a Copy to D:\Help before i changed from Win7 32 to Win7 64
After it was done I deleted the Folder.
173 MB of Data in 937 Files and 485 Folder.
http://img26.imageshack.us/img26/5958/w764bug8beta14.jpg
Perhaps it happend because i had to chance a lot of Userrights while Deleting Files
Today I could delete the Folder, i had restored from a BackUp, without Problems.