1. Start Windows Explorer and go to the folder C:\Documents and Settings\All Users\Application Data\Microsoft\User Account Pictures.
(The option Show hidden Files from Tools/Folder Options must be checked)

For example, if your username is Cristian, rename Cristian.bmp to old_Cristian.bmp.

C:\Documents and Settings\All Users\Application Data\Microsoft\User Account Pictures\Default Pictures
to something else. For example:
C:\Documents and Settings\All Users\Application Data\Microsoft\User Account Pictures\No_Default Pictures


5. Type regedit and press Enter.

6. Navigate to this key: HKEY_CURRENT_USER \ Software \ Microsoft\ Windows \ CurrentVersion \ Policies \ Explorer and set NoUserNameInStartMenu value data to 1.
If you don't have this dword make it by right clicking on the key and select New.


7. After you Restart your computer you see that your username and picture are gone from your Start menu.
