Please Follow steps
1- Close MTA San Andreas , other Internet Browser , other Programs
2- Please Press "Windows Key + R"
3-Then type "taskmgr.exe"
4- then go to "Performance Tab"
5- Then Screenshot and post here
and update your drivers from here : http://www.touslesdrivers.com/index.php?v_page=29
also , maybe problem caused by a virus
Download any Antivirus from here :
http://windows.microsoft.com/en-us/wind ... s-partners
* You Should use AVAST Antivirus
Make sure that antivirus up to date