It disappeared. Not just the Start Menu, but the CSM.
How do I get it back?
in the control panel, in add remove programs, under add remove windows components, is accessories and utilities installed?
Yep, but I don't see how that helps.
just to clarify your issue, the search option is missing from your start menu and also from the customization window:
Well, with the help of a TSGer, I managed to fix that by deleting 'NoFind' in the "HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Policies\Explorer" section of the Registry, but it still does not work; nothing happens when I click it.