Step 1: Download this http://www.mediafire.com/upload_complete.php?id=5i3jkbdyb2w and right click and click on Extract to to Mouse Pack By Korn Dog 2003\
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Step 2: Open Mouse Pack By Korn Dog 2003\ and click on Mouse Pack By Korn Dog 2003\ than click on it again till you get to mousepack now go to usbmrs11 and open it and click on No till it says Enforce a polling rate of 1000 Hz/1 ms? (Y/N) and click Yes, but don't restart after this and go to Mousefix folder now and click on mouse_fix.reg and click yes and it should say somthing like sucessfully added to registry. Now you can restart your computer and open up the mouse rate checker.
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Step 3: Now to make sure theres no acceleration for Counter-Strike. Open up steam and go to My games tab and for Counter-Strike right click and go to properties and go to set launch options and copy and paste this in to your command lines -noforcemaccel -noforcemparms, also make sure epp is unchecked in Mouse.
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Some gaming mouse such as the G5,Razer mouses such as Deathadder and Lachesis are already set at 1000 and they have software to set it to 1000 already and this is not needed except the noforce commands and cpl mouse fix.
Credits; to KornDog2003 for making the mousepack and for Zeper(me) for providing the guide.