Video problem

I have Dell Inspiron N5010 15R with Windows 7 Home basic,Intel i3 processor,3 GB of RAM (DDR3),320 GB HDD,Intel HD graphics.I bought it in 2010.So there was no additional graphics card in my PC.So I cant play game with high graphics.But I used to play one game i.e. Counter Strike 1.6.This game was running smoothly ,but now a days it wont.I update my video driver,but no result.So please help me to play CS 1.6 smoothly in my PC.For your kind information the system requirements to play the game is...600 MHz processor/ 128MB RAM/ 32MB Video Card /Windows 2000/XP.
Thank you.