Gmod error.

Every time I try to open Gmod I get this error telling me to close out the game already running but there is no other game running I even restarted steam etc.

It always seems to happen after I get off of HL2DM.

Now it says Searching for steam game updates but it’s been doing it for about an hour now.

end process hl2.exe
and
launch gmod
or
delete everything hl2dm related in your steam folder and re-download then try again.

There isn’t one, now it’s telling me it’s searching for game updates but I left it running when I went to sleep it’s still searching…