Random stuttering of whole system from time to time

Hey guys, I have this problem where from time to time, my whole comp stutters, from the cursor, to the audio. I assume its because of the HDD because of two things:
1. My HDD light in my desktop stays constantly on for a second and this is when it operates fine. Then right after, it turns off for a split second and this corresponding second causes the whole comp to stop/ stutter. It will then start again. This cycle happens for sometimes 10 minutes or more, making the comp unsuable.
2. After one of these events happened, I looked at event viewer and saw in the problems this: "The shadow copies of volume C: were aborted because of an IO failure on volume C: source: volsnap".
I assume I have bad sectors and volume shadow copy is amplifying the problem, but even after I scanned the HDD with the built in chckdisk, the problem still happens from time to time. Anyone have any ideas? I have a seagate 750 gb 7200 rpm drive.

ICit2lol said:

Yep mate run the HDD test from Seagate - SeaTools | Seagate

another if that comes up empty is the surface test with Partition Wizard Best Free Partition Manager Freeware and free partition magic for Windows 7, Windows 8, Windows Vista and Windows XP 32 bit & 64 bit. MiniTool Free Partition Manager Software Home Edition.

Is seagate's RMA warranty lifetime?

its not shaking the computer if you mean vibrating really hard, but it makes the computer stutter whenever windows tries to do a volume shadow copy. Is it really the harddrive? or maybe the motherboard, just to make sure

Layback Bear said:

It still sounds like a hard drive to me. I would still do a backup and then do what ever testing is necessary.

As a backup, is it fine, despite the bad sectors, to clone/image the hard drive in question to another drive?