HDD Repair, is a fake Defragmenter tool (rogue) from the same family as: FakeHDD. This version has the same GUI as System Repair, Windows XP Recovery, Windows 7 Recovery
To register (and help removal), copy paste this code: 8475082234984902023718742058948
Click on Help & Support button.
If your PC is infected with HDD Repair, follow Bleeping Computer's removal guide.