Salut! Yes, I've got the same issue with an equivalent configuration (Windows 7 x64 / AMD Radeon mobility -for laptop). Ok, let me describe the steps and chose the one you'd like to debug. If you think the issue is coming from your graphic card (after updating to the latest driver or because the screen is messing up a bit...): 1- Download Driver Sweeper. It's a freeware available here: http://phyxion.net/item/driver-sweeper-320.html It will erase all leftover driver in your computer. 2- Find the latest driver available for your graphic card (AMD / ATI eg.) but go directly onto the manufacturer website (Toshiba, Dell, etc.) because for laptops, sometimes the drivers you found on AMD or nVidia are specifically made for PC Desktop only... watch out! 3- Try to launch the game with normal settings. If it doesn't work, try with these parameters: -game cstrike -console -high -dxlevel81 -freq60 -steam -appid 240 (to force css to run in priority mode, with low directX level and average frequency... should be around 50 or 60 depending of your configuration) Then, try to put again -game cstrike -console -high -dxlevel95 -freq60 -steam -appid 240 to enable again directX 9 (CSS supports up to directX 9.5... but after, it may bug!) Ok, if you think it's not a graphical issue, try to delete the files "steamclient.dll" and "filesystem_steam.dll" found in your directory : \Counter-Strike source\bin. Download them again by applying the patch again (or other patch like this one: http://www.mediafire.com/?24uu0rac315yq88) It should work... hope that will help! Bon frag all! -Cookman