"Run" command missing from start menu

Heres the script given in italics below. Just copy and paste in a notepad. Name the file as "runcmd.reg". After you get the file just right click and select merege. Then restart the computer:

Windows Registry Editor Version 5.00

[HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Policies\Explorer]
"NoRun"=dword:00000000