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“Why is my computer running so slow and how to speed up”:

Learn how to clean up your computer and speed up your computer here:

If you have error messages and freezes, fix them. Otherwise leave the registry alone. A few extra lines and links do not slow a system down, but messing in the registry can turn your computer into a doorstop.

This I find is the best on the market right now tuning your computer.

Advanced WindowsCare Personal 2.7.1
Select the “Download now” button

Cheers

cleaning a registry only speeds up your computer if you have 300 plus errors in the registry as for Advanced Registry Optimizer you have to pay for it if you want a registry cleaner you can get a good free one called ccleaner here ccleaner also will delete your junk files as well if you want it too freeing up disk space