I just used CCleaner to find duplicates and put them all (4000 plus) in recycle bin. My Outlook is looking weird with things grayed out and non functional. Do I have an option to fix this without restoring all files back from recycle?
Restore the files if you can.
From your description what you have done is selected everything found and deleted them all.
This is a mistake as you have deleted duplicate Windows System Files which are often needed.
As you have found if you delete those system duplicates then your machine will stop working properly.
(In my opinion the duplicate finder in CCleaner7 is dangerous because it won’t let you ignore System Files when searching, and will then let you mass delete them without any warning).
If you can’t restore the files sucessfully then I’d suggest using DISM followed by SFC to repair the System.
For instructions how to do that see:
If doing a duplicate file check in future you need to make sure that it is only duplicates of your own files that you remove.
“Find all > Select all > Delete all” is a no-no for duplicates and it should never have been allowed to happen in CCleaner7.
