Windows 7 64bit freezes while media sharing

Recently my computer has been freezing or locking up to where everything cant be moved and i have to hard shutdown or press the reset button. This only happens when i am media sharing with my xbox 360 and ps3. I dont run media center for it i only share my folders with windows media player for streaming. I have no clue why this happens and it will randomly occur at different times. Sometimes it will freeze after a minute, other times it will go for 3 hours without freezing then out of nowhere it does.

Has anyone else experienced this problem or have any way to help me out.

I have run the power usage troublershooter and set it back to my liking after that didnt fix anything.
My drivers are working fine and there are no yellow question marks.

I would appreciate any help.

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