Why windows 7 is not runnig smoothly

[kabilrohan]

Hello,i have windows 7 home premium.but from last two days i am getting a time lag between typing and displaying.Except it audio and video are also not running smoothly.i am facing some breaks in their execution.
Please reply as soon as possible.

 

[pit_1209]

a virus maybe? try to discard that first

 

[vertical777]

scan for viruses, update your display drivers, check for bad sectors on your drive.