I run CCleaner 2.29 with XP SP3/IE8/Chrome5.0.356.2
I check all the stuff that Google products left behind every time that we make an update [Chrome, Google, Desktop..etc installer or old cache].
They are Gbytes of files left on the hard disk.
I don't know, who are the necessary files, but you would.
It will be a way to be sure to delete the right files & ghosts.
For the moment, your tool, don't erase those files.
Can you add this feature in your next version.
It will be great.