Games not working properly in my Acer Aspire S3-391

[Ruthrapathy]

Hi.I cant play Euro truck simulator 2 in my Acer Aspire S3-391.It strucks while playing.Similarly NFS Most Wanted,God of war 2,etc.....But those games minimum requirements are much lower than my system configurations.I performed Clean Boot too.But still its not working.I have my all drivers up to date.Please suggest some solutions