Best Windows registry / system cleaners

Regular cleaning your Windows with specialized cleaning software (sometimes nicknamed 'system cleaner' or 'registry cleaner') can significantly improve the performance of your system.
Below is list of some well performing cleaners:

TIP: WiseCare365 Pro

All-in-one PC tune-up utility. Clean your PC in seconds. Keep your Windows secure, clean, and fast.
Our opinion: quality and trusted product. You will not miss with that one.
Order WiseCare365 Pro - for 1 computer
or save about 60% with family/small business pack:
Order WiseCare365 Pro - for 3 computers

Black Bird Registry Cleaner by Black Bird Cleaner Software

Keep your PC at peak performance with Black Bird Registry Cleaner.
Our opinion: Fine value for price. For those who want registry cleaning on budget.
Buy Black Bird Registry Cleaner

Black Bird Cleaner by Black Bird Cleaner Software

Clean your PC from unnecessary and temporary files, free valuable hard disk space, and speed up your system.
Our opinion: Fine solution for cleaning entire system - not only registry, but also junk files and other trash.
Buy Black Bird Cleaner