When i start a level, it works properly, but only for 1-10 seconds. Then it starts lagging like HELL. The sound also twitches. Well, you just need to see this.
ZDoom works perfectly, but i need GZDoom.
P.S. Sorry for the watermark, i am too lazy to crack Bandicam XD
P.P.S. Oh crap, the gameplay wasn't recorded. But believe me - it was FREEZING.
video.rar