What happens if registry keys are deleted?

Related questions

1. What is the Windows Registry and what is its purpose?
2. What is Regedit?
3. What is the registry used for?
4. What does add to registry mean?
5. Where is the regedit EXE file located?
6. Where can I find regedit?
7. What is MSConfig used for?
8. What is a registry in a computer?
9. How many main registry hives are there?
10. How do I open regedit in Control Panel?

Tags

1. #exist
2. #contents
3. #physically
4. #their
5. #absolutely
6. #nodes
7. #however
8. #stuff
9. #registry
10. #positively
11. #opposed
12. #windows
13. #regedit
14. #deleting
15. #delete