Starcraft 2 performance

Starcraft 2 used to run fine. But when i installed avast, I get like 15 fps from the very beginning of the game. I’m assuming the performance problem is related to avast, which is why I’m posting this thread here. Can anyone confirm this and maybe tell me how to fix it? Thanks.

Is gamemode enabled…?

I don’t see how antivirus would decrease framerate. Increased level loading times yes, dropped framerate, i doubt it. Check your graphic card drivers, check graphic card temperature, clean the cooler if necessary. Also check if yu are not using excessive anti-aliasing for some reason. This feature can severely decrease performance (while making graphics nicer though).

I had gamemode enabled. And I already run the game on all low graphics (My computer can only run on lowest, I don’t see why it would start having trouble now.)

Ok I figured it out, it was because I was running the game in windowed fullscreen mode, rather than full screen mode.