I suggest you download and install
CCleaner and run its Cleaner utility. Once installed, you will see the Cleaner button at the top of the left column when you open CCleaner. The default settings are fine for most users. No guarantee this will help but no harm in trying and it might, indeed, resolve your problem.
The regular version of CCleaner does come bundled with a toolbar. You can unselect it during installation of CCleaner. Alternatively, you can get the
Slim version, which does not have the toolbar bundled with it; otherwise, it is the same as the regular version. If you start with the Slim version and you want to stick with it when updating CCleaner to the latest version, you need to observe which version (standard or Slim) you're downloading when you update; otherwise, you might end up with the standard version when you intended the Slim version. You can either download CCleaner from the links I have embedded here or directly from the maker, which is
http://www.piriform.com/ccleaner
