When i have sound on i get around 1-4 fps but when a disable sound in P3D i get around 30 fps. I have tried reinstalling it with and without antivirus.

So when i load up in the 767 its all fine in the beginning but after around 15 seconds it drops to around 1 fps and when i mute the sound by pressing Q in prepar3d so it mutes all sound from prepar3d it goes up to around 30 again. Also noticed that when the problem is happening the GPU usage goes to like 10% and when i mute it jumps to around 50%

Its both and the beginning it was just the 767 but now it happens with other planes too so its probably hardware or prepar3d issue