Is CCleaner registry cleaner safe?

Related questions

1. Should I use CCleaner with Windows 10?
2. Who bought CCleaner?
3. Does CCleaner fix registry errors?
4. Is it safe to install CCleaner?
5. Is CCleaner hacked?
6. Will CCleaner delete important files?
7. Is CCleaner malware?
8. Does CCleaner really work?
9. Is CCleaner still free?
10. What removes CCleaner?

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16. #cleaner