HDD Observer is a powerful monitoring and repairing tool for your hard drives. HDD Observer can detect a lot of hard drives troubles and give a solution for them: 
 
- Monitor hard drives health, performance and temperature
- Monitor hard drives activity and show it in a system tray icon
- Check file system fragmentation and registry fragmentation
- Defragment file system and registry
- Automatically and real-time find and remove un-needed files and registry values
- Windows XP/2003/Vista compatible
- Native 64 bit support for best performance