When you first download HDD Regenerator without a license, you receive a demo version. This demonstration version serves a specific purpose: it allows you to scan your hard drive and attempt to regenerate the . If this first bad sector is successfully regenerated, this indicates that your hard drive has a good chance of being fully repaired using the registered version. If the first bad sector cannot be regenerated, the software will advise you to replace your hard disk drive as soon as possible.