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.