I bought the hacks from another company and I'm the only one in their community who has this problem when running TF2 with the cheat injected. It will usually happen during the VAC loading screen and if I put -dxlevel 80 in launch option it will crash about 5 minutes into the game. It only happens when i'm in a VAC secured server. The hack is not patched because it works for everyone else except me. I've tried everything to fix it with no luck, including reinstalling the game/steam and turning off multicore rendering (and many others).