Go Here and download CCleaner.
Double click on it to install it.
Click on your language then Next then I agree then next again.
When you come to the Installation options window (the next window after clicking next)
Uncheck all but Create a Desktop Shortcut.
Then Click on Install.
After it is installed double click on the icon on your desktop to run it.
Choose Run Cleaner then yes at the prompt to permanently delete files.
It may take a while so let it finish.
After that Click on the icon to the left called Registry
Then click on scan for issues.
Then click on Fix selected issues.
And then yes to making a backup.
It will save it in your MY Documents Folder.
Then Click on Fix all selected issues and yes that you really want to do it.
After that is done then exit out of CCleaner.
Let me know if that icon stays away and then we can finish up.