Crash To Desktop - Online

I keep crashing to desktop, sometimes it’s becuase the sever’s crashed smoetimes it’s just me and I get this error

The instruction at “0x11f43read” referenced memory at “0x0f3e1454”. The memory could not be “read”.
Click on OK to terminate the program.

What dose that mean and how do I fix it?

Well bout the error thats because Gmod is a Rig Hog.Try closing background programs.Tho with the no error one-I have the same problem and would like to hear how it can be fixed since its extremly anoying!

The first bit= I close EVERYTHING I possably could close down and then run Gmod, I never had in the past… But thank you.
The second bit= Huh?