# Find the following key:
HKEY_ LOCAL_ MACHINESOFTWAREMicrosoftWindows NTCurrentVersionWinlogon
# On the right hand pane, find Userinit and double click it to edit its value. Its value should be something like this (depending on your Windows Installation Directory):
c:windowssystem32userinit.exe
# If any additional values are there (most probably My Documents folder will be listed there), remove them and click OK.

Most probably My Documents Folder will not come up at startup again.
gooogle bratee!!
