Game was working with Win8. After applying 8.1 I have been experiencing leg animation issues with player and NPC on both survivor and infected. Check out this link for actual gameplay http://www.youtube.com/watch?v=7Ox6PzxO1rI
It doesn't and has never crashed nor do I experience mouse lag.
Open to helpful advice, "Get Windows 7" is not helpful as it does not have Hyper-V.
Thanks in advance.
relevant rig info: OS Windows 8.1 Pro [6.3.9600 N/A Build 9600] ASROCK Extreme 6 Intel Core i7 3930K G.Skill Ripjaws Z F3-12800CL10Q2-64GBZL 64GB Sapphire Radeon HD7950 3GB OC Edition V2 (2 in xfire) Samsung 840 Pro Series 256GB (OS) RevoDrive 2 X2 - PCIe 240GB SSD (Games)