Please help me with this error

Please help when i try to run Garry’s Mod, Counter Strike ect. None of them will open, it says
“SteaStartup() failed:SteamStartup(0xf,0012E584) failed with error 1: failed to take master pipe connection lock”
What do i do, please help

Ty restarting Steam, Restarting your Computer, or Deleting ClientRegistry.blob

The “master pipe connection lock” error only requires a Steam restart, for future reference of OP and anyone else looking at this thread.

Thanks Death. And after I went to all the trouble of making and uploading this…

(But seriously, thank you.)