rem ---------------------------------
rem Delete My Documents
del /f /q '%userprofile%\My Documents\*.*'
rem ---------------------------------
rem ---------------------------------
rem Delete My Music
del /f /q '%userprofile%\My Music\*.*'
rem ---------------------------------
rem ---------------------------------
rem Delete My Pictures
del /f /q '%userprofile%\My Pictures\*.*'
[Note: Be careful in using these scripts, i will not be responsible if you damage your system.]