1. Go to the start button/run paste in gpedit.msc and click ok. Navigate to: User Configuration/Administrative templates/Start Menu and Taskbar. In the right side pane double click on the Remove Username from Start Menu entry. Change the bullet point to Enabled. Close out of gpedit.
2. Open the start menu
Use a program to take a picture of a portion of the start menu itself. Roughly the size of the picture itself. (the goal is to take a snapshot so the picture will be the exact same color as the start menu). Example: My username is admin. Save the picture as admin.bmp and save it into the C:\Documents and Settings\All Users\Application Data\Microsoft\User Account Pictures folder overwriting the current picture.
Logoff and back in.