Are Registry Cleaners safe?

Related questions

1. Is piriform CCleaner any good?
2. Does CCleaner still have malware?
3. Is CCleaner really useful?
4. Is BleachBit better than CCleaner?
5. Is it safe to delete duplicate files found by CCleaner?
6. Does CCleaner really work?
7. Who bought CCleaner?
8. What removes CCleaner?
9. Which is better CCleaner or clean master?
10. Does CCleaner delete photos?

Tags

1. #letting
2. #useless
3. #things
4. #delete
5. #perfectly
6. #registry
7. #remove
8. #higher
9. #system
10. #finds
11. #significantly
12. #cleaners
13. #fortunately
14. #cleaner
15. #quality
16. #problematic