This topic will help you much,
What's the slowhack?
-A server hacking your cs folders, which hacking all the configs of your cs. Which when you run cs, it redirects you to its server or clicking on any button like "c".
THERES TWO TIPS:
I prefer the second tip, not the first.
First tip is for lazy guys only: (I'm serious)
Another tip. ( I prefer it in my opinion. )
You have to check all your configs, your config, autoexec, userconfig, either server config, etc.
If you find something like bind "F3" "Connect "ip of the server"" then, you have to remove it, you will find this binds in your all config.. (autoexec, your config, etc. ) AND delete your gamemenu.rs
After you finish, change your cs folder properties to "READ ONLY" by clicking right click on cs folder, then properties, and you will find down "Read only" and "Hidden". Click on "Read only" then press ok. Why making file "read only"? In order to not getting slowhacked again. Try to run cs after this tips. SOMETHING ALSO, CHANGE EVERYTHING IN THE RESOURCE FILE TO READ-ONLY. and the folder too.
I hope this tips helps you, it really works.
Your sincerely,
h1x