you sure it actually happens only while playing? Are there other wifis in your areas (the most likely cause of interference)?
try altering the power options anyway from
here, so that the wireless card is always at "max/best performance" in the power setting you use while playing.
If it's too hot to keep hands on the hot surfaces (the bottom of the lappy I suppose), buying a dedicated laptop cooling pad is a very good idea regardless of this particular issue. Too much heat does put a strain on components, reducing lifespan.
in this post I said some tips about buying one.