So I bought the game a couple of days ago and am LOVING it, but I have one major problem; after about 15 minutes of playing, the game will do this thing where it completely freezes. The sounds of the birds always remains (as well as water if I am near to it). It stays completely frozen for (on average) about 3-6 minutes and then the game resumes. Once this starts, it usually takes about another 10-20 minutes for it to happen again. Sometimes it will happen once or twice, and not happen again until I switch maps or restart the game.

I can't exit the game at all when this happens (can't even open up task manager), and if I try to use the Windows + D shortcut to desktop, everything goes black. Can some one help me with this problem

tell us a bit about your computer specs and OS.
Try to disable your virus scanner while playing, also to close every other program.
Does it happen in the campaign? or in a quick match or doesnt it matter?

it doesn't matter it just freezes and I have a ( windows 7 model Hp pavilion dv6 notebook pc, processor is AMD A8-3520M Apu with radeon HD graphics 1.60 GHz, system type is 64 bits, my video card is AMD Radeon HD6620G. Hopefully I can get this fix I love this game

Try playing without shadows the next time you're on it.

There has been two other cases recently of somewhat similar freezy/crashy behavior, with the only apparent connecting clue being AMD APU. The crash dumps I got from the earlier cases pointed to a problem in Ogre3D shadow camera setup, and simply playing shadows disabled was confirmed to be stable.

A fix is going in for 0.96 related to this, but I've yet to hear if the fix actually works with shadows enabled from the other players. Hard to debug it as I can't reproduce the problem myself.