Run sfc /scannow.
http://support.microsoft.com/kb/929833
"IveLostItAll" <> wrote in message
news

77CE1A1-AD44-469D-9382-...
> I've no idea how this has happened but it seems Regedit has disappeared
> from
> my computer entirely. I also noticed Notepad had disappeared a couple
> weeks
> ago. Not sure what is causing this as neither my anti-virus program nor
> my
> spyware program are detecting anything. Regardless, I really need to know
> how to reinstall regedit.
>
> quick info:
>
> Windows Vista 64 SP1