[CCleaner changed desktop icon images]

This happened to me too. I am using Windows 10 and would like to change the icons back.  

Found this:

The CCleaner Browser is only being offered to a limited number of users when Updating CCleaner itself.

Most browsers will change your file associations when you first install them.

If/when this happens then it's easy enough to change them back.
For the example of PDF files:

• Right click on any PDF file and select 'Open With      > ' and then 'Choose another app'.
• Choose the application that you want to open PDFs with, then tick "Always use this App to open PDF files'.
• Click 'OK'.
• The file will open in the App that you have chosen, you can close it if you dont want to work on it just then.
• Job done, and your PDF icons should change back to how they were. (If they don't change straight away then restart your computer).

A change has been promised to the Browser to make file associations a more obvious seting during the Browser install.

The Browser is now available for others who don't get the offer during a CCleaner update/install.

 

[CCleaner changed desktop icon images]

This happened to me too. I am using Windows 10 and would like to change the icons back.