It also need to be installed in a unique location on your hard drive. If this is not possible or you are not sure of it or of the integrity of your Hard Drive OS, I recommend that you use the Windows System Repair mechanism as described in this wiki article This should also provide a means of repair.
It's also important to understand that this utility operates only on a Intel Pentium based machine without USB ports. Some Pentium machines also have this functionality built in.
The 50e0806aeb