how do i know if i have a virus or if hard drive is damaged

[DubleAX]

Hello there
i had a computer last week that 1 or 2 minutes after the computer is turned on it got a blue screen or a scrambled voice if i turned on a video
i went to an electronic store which told me that the problem is with the hard drive and it could be because the hard drive it self is damaged after 2 year and the werenty expired
or there is a virus and they told me that i can check my self and the maximum is that i will buy a new hard drive and install windows
i did a format on C local drive and installed windows 7
and now the computer is running without blue screen but im afraid that the hard drive is needed to be replaced because the computer runs pretty slow and this is a gaming pc

 

[John7128]

Good call to check.....Use CrystalDiskInfo it will tell you.
Blue screen often is an issue of bad sectors in big numbers, so you are right to check.