I had similar issues awhile back. Running tweaking.com I recommend these guys if you don't know how to custom write your own script and their little free program basically restores permissions as they should be, fixes registry etc etc etc long list. Be sure to follow each step. i.e backing up registry files, running a malware scan, system restore etc etc.
It worked for me... but my issue was bigger than that eventually. I found I was getting blue screens often, and I eventually tracked down 30bytes of corrupt memory sector, that believe it or not, when a program accessed it, it would then corrupt what it passed onto disk. So my only solution was to buy new memory, and start with a new disk (got a solid state and never looked back) Of course, my issues vs yours won't be the same.
BUT, for some unknown reason your permissions are broken (this can be a result of so many things - even malware)
Try tweaking.com windows fix software. It doesn't do anything, except restore everything to what it should be - it even checks your windows installation to ensure no files have gone missing etc etc. Very nice program.
I used it for 7, and windows 8. I haven't used it for windows 10, but I am sure it will be just as good, they might even offer some options to deactivate all the tracking stuff of windows 10 - (Windows 10, worst release yet as far as security)
[quote:ug0thhad]Tweaking.com - Windows Repair is an all-in-one repair tool to help fix a large majority of known Windows problems including:
Unhide Non System Files
Repair problems with .lnk (Shortcuts)
Windows Installer (MSI)
Policies Set By Infections
Winsock & DNS Cache
CD/DVD Missing/Not Working
Reset Registry and File Permissions
Register System Files
Remove Temp Files
A quick look, I didn't see windows 10 support
[quote:ug0thhad]All default permissions for 7, 8 and 10 have all been updated after the windows updates where done for the patch Tuesday of this month (Aug. 2015)
Okay, seems they added support