Dunno if this was a CC Cleaner problem or not..
Here is the setup...
I have a drive tray
I swap C drives to use different OSs
I also have a D drive - Internal mount
I have NEVER had any issues doing this, until Win 10 and MAYBE CC CLeaner
What happened? I Had Win 10 drive in the C bay D drive is internally mounted. I ran CC and cleaned the registry. A LOT of crud was there and I backed up the files and did the Fix. Then scanned again and found more and repeated the process. I shut down Win 10. Took out the C drive and inserted the Win 7 C drive and booted up and Scandisk ran and did a lot to a lot of files. Turns out the files were on the D drive. Now Win 7 boots but D drive is there but can not be accessed due to no permission. So I setup permissions and got access back. Now I eventually shut win 7 down and boot Win 10. Same deal, scandisk runs and the Win 10 boots and D drive has no access. So...dunno what the problem is but there is one. Could be a Win 10 thing, could be CC Cleaner...I'll never know for sure as I don't think I'm slick enough to figure it out.
So I'll Reformat D drive and reformat the Win 10 drive and install Win 10 again but this time NO CC Cleaner!