System Volume Information is used by System Restore to keep all your restore points.

Since it is infected with a virus you cna simply disable System Restore which will remove all restore points.

Then rescan with your AV as well as do an online virus scan.

Once the scans found no more viruses you can turn System Restore back on.

To turn on/off system restore:
Right-click My Computer | Properties | System Restore tab and make your changes.