My Documents Folder should not normally open on Windows Boot Up.
This is a problem I recently found occurring a lot on computers I worked on and the solution is as follows:
Note that this involves editing the windows registry which is the 'brain' of the computer. Therefore, if you feel uncomfortable doing brain surgery, please notify your computer tech on this problem.
Run regedit and navigate to:HKLM/SOFTWARE/Microsoft/Windows NT/CurrentVersion/Winlogon
In there there should be a value (on right hand side of screen) called Userinit.
The data for this value is probably something similar to:C:\windows\system32\userinit.exe,C:\windows\system32\userinit.exe
If you do see a duplicated string in there similar to the above - simply double click on the Userinit value and edit the data so as to delete everything to the right of the first comma (,).
In the case above you would leave only:C:\windows\system32\userinit.exe
Exit registry edit and reboot. No more My Documents on boot up!
As always, more TIPS can be found on my TIPS page as well as many free utility software programs for download from the SOFTWARE/SUPPORT page.