Freezes when I try to move

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So anytime I try to move my character forward backward left right any direction my game will freeze to unfreeze it i either have to stop trying to move or hold down a direction and tap any other direction but then I can move but once I try to use any other movement key with me still holding down the other it will freeze or I hold alt and it freezes and if I let go of my w key or watever and try to move again it just freezes the same way. Been running arma 2 with normal to low settings for about 1 month never had this problem before today.... any fix couldn't find any forum posts on this.

Edited August 12, 2012 by Darkrevo

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So apparently my newest driver screwed everything up so I reverted to an older one everything running good again.