I think I have a virus on my computer and I want to completely erase the disk to make sure it is gone before I re-install my operating system. What is the best product for doing this?

For completely erasing an entire drive you can use Active@ Killdisk. It can destroy all data on either a logical drive or a physical drive.

We recommend installing the software on another computer, and using the included Boot Disk Creator software to create a bootable USB to erase your disks.