Noforce are some advanced mouse settings that you can use to improve your gaming experience..
Right click the Counter-Strike shortcut and edit the target text field . It must have address to your HL.exe followed by "-nomaster -game cstrike" . Now add "-noforcemaccel -noforcemparms -noforcemspd" , after them .
I searched net a lot regarding importance of each command,and got a mixed review.Where some people critisize them others claim they are must . The detail of each of them is explained in brief in next few lines.
The following three commands are the most used commands you will find in a users launch options. I have checked settings of some big name in pro CS and had seen almost all of them use these settings.
noforcemaccel – The noforcemaccel command will make sure Half-Life does not try and manage mouse accel when it is disabled in your windows options.
When to use? When mouse acceleration is disabled on your desktop and you want the same results for your in game experience.
noforcemparms –Uually when you start up Counter-Strike your mouse configuration will switch to application mode, allowing the assignment of keys already assigned to your desktop (like mouse3). This variable turns that feature OFF. There is really no benefit to this command.
When to use? When you are experiencing difficulty with button assignments. A part from troubleshooting this command has no practical use.
noforcemspd – uses desktop mouse speed settings. Noforcemspd forces Half-life to use whatever speed settings you have applied to your desktop via mouse properties. Whatever the value, Half-Life will use it as guidance.
When to use? When you want your out of game speed to set the bar for your in game sensitivity.
Hope this will help you. Do trouble me if you get any problem..