Tired with slow PC

My Windows PC has gotten really sluggish and i think I should try cleaning up my registry to improve performance. Problem is that i don't know which reistry cleaner works best for me . Help !

Well there was Windows Installer CleanUp Utility, from Microsoft but it comes with warnings... The Windows Club and another warning here at Microsoft support There are plenty of programs out there to clean up your registry BUT the point is if you don't know exactly what your messing with the consequences can be damaging to your computer.
Maybe you could try instead some other things like updating your drivers and re-flashing your BIOS with an updated version
There are some good registry cleaners out there but what works "best for you" ? I use Ccleaner and you can download it free from here
hope this helps

I agree with using 'CCleaner', very good at keeping the clutter down.
Also try a modern defragmenter, such as; http://www.auslogics.com/en/software/disk-defrag/download/
and use the 'defrag and optimise' option.
Adding more RAM will make a pc operate 'faster', if you have 1GB or less.

While with Xp, i used a program called RegCleaner for the registry. Always did fine by me, mainly due to the "backup registy option" (but most registry cleaning software comes with this anyway now).

If Win 7 is your OS, i'll agree also with CCleaner...It's a great piece of kit.