CCleaner

[GER_T4IGA]

Is it trustworthy? Is this even more than other "speed up your PC"-bullshit-tools?

[WoctorDho]

Ive been using it for about a year. Works well for me. 

 

This might help:

 

He does a great job explaining why/how CCleaner works

[the pokemon kid]

I use it all the time. Its a brilliant tool, I have found that the registery cleaner very useful! It also has got a drive wiping tool which is useful for when you sell hard drives.

[manikyath]

while it has all the checkmarks of a dodgy program, it actually does really well to clean unnecessary junk off your hard drive, and fix registry errors.

(and it may or may not have been the key to me being able to crack sims2 so i can have a portable install)

[WoctorDho]

It works, I just don't bother the whole premium/pro thing.

Free version does what you need to do.

 

agreed. paid/pro version is not necessary. 

[The Official Czex]

The Registry Cleaner on that thing is a godsend.

[flibberdipper]

I freaking love it. I haven't had a computer in the last 6 years that hasn't had it installed lol