CCleaner has long been most people's favourite tool for cleaning up a bloated and slow Windows installation, and currently claims to have been downloaded more than a billion times. It's certainly way more powerful than the disk cleanup feature which is included in Windows. It'll tidy up temporary files, your registry, many well-known applications, and more, freeing up disk space and speeding up your PC.

Piriform, which makes CCleaner, released a new version last week, so if you're not running 5.15 you should upgrade. Among the new options is a cloud-based version which makes it easier to clean multiple computers if you have a company full of them. For home users, though, the stand-alone free option is still the best and simplest.  Read More