FPS drops

[Dave]

Heya guys.
             I've a problem in only 0.4 that my fps drops too much like 40-20-30 and it makes me laggy. But in 0.3 my fps is fine like 29-30-31.
             Any solution?

[.]

Are you running the game in full-screen mode? Full screen mode is by default on the latest release, but just to be sure. Also, a couple specs of your hardware would help to find bottleneck.

[Dave]

Sorry for late reply, the problem is solved. It was because of some viruses.
Thanks.