First of all Welcome to forums!

now lets get to it
1. GameGuard not needed anymore since they going to start using a new anti-cheat program. Just start the the game with unpacked_4.6.17 and load it with cheat engine after your fully logged in and have chosen a server.
2. log-in first and chose server as well and then start up hacks. Works better this way. Or else you get the re-install client error
3. Yes once you do all what noname says you must select the box for it to take effect. remember vac hack takes effect right away but auto pots and skill hack and alot more must be used first and let the cool time finish and then skill hack will been taken affect. same with auto pots must use them first then then work. Unchecked them and teleport to another map and they should turn off.
3. again... log-in first and then activate cheats!
Hit thanks if it helped!