east-tec DisposeSecure will totally erase every sector of your hard disk. Any data on the drive, including viruses, will be completely erased.
However, there are viruses that can be stored in the system BIOS even if the hard drive has been wiped. One solution to get rid of the virus would be to turn off your computer, unplug it, and then disconnect the lithium ion battery. Everything should be reset to the factory setting and you will get rig of the virus. Most system BIOS have an option to "Restore Factory Defaults".