Here are the fixes that worked for both of my computers. Now these fixes may not help your computer so if they don't please don't complain to me .....i'm just trying to help. Found a fix for the Cannot open C:\SIERRA\Half-Life\cstrike\cl_dlls\client.dll - Problem. Solution: Remove Halflife and Counterstrike also delete the folders. Then defrag your hard drive then reinstall, also make sure you have the lastest version of Halflife before you install CS. I did this on both of my computers that had this problem and now they work fine. Hope this helps Also for those having the sticky mouse problem go into confiquration when you start and under audio options uncheck everything except Use EAX Hardware support. This solves my sticky mouse problem which i also had happen on both of my computers. Also run HL.exe in Windows ME mode.