Malwarebytes makes an app called "File Assassin".
It's free. Download it and run it to get rid of these files. Permissions don't matter with it, if you select files for "assasination" they're gone. No ifs, ands, or buts about it.
Note: In may research I found a thread, don't remember where, with a solutions that sounded like it was by a tech which recommended downloading and installing a product called unlocker which is freeware. This installed Delta Search, a search engine with poor ratings and considered a PUP, which takes over web searchs.
If you download Unlocker from the original developer's website http://www.emptyloop.com/unlocker/ you won't get any unwanted bundled software.