Open Registry Editor Then Go To : "HKEY_CURRENT_USER\Software\Microsoft\Windows\ Curr entVersion\Policies\Explorer".
On The Right, Make A New Entry With Right Click On Your Mouse Then Choose "New | DWORD Value" Change The Entry's Name Into "NoUserNameInStartMenu", Double Click In The New Entry And Fill The "Value Data" With "1". Press OK, Exit From The Registry Editor. Restart Your Computer.