Reader DC still preventing Reader 11 install

[Pug_luv]

I mistakenly installed Adobe Reader DC on my system.  It did not ask if I wanted to keep the old version - it is gone.  I can not get the DC version to open at all much less open any documents  I read the Forum discussion and the knowledge articles about  un-checking Enable Protected Mode at startup, checked that it wasn't the 64 bit and several other topics.  Could not get it to work.  Want to go back to XI, but I still get the message a newer version is installed.  Uninstalled thru programs in Control Panel, used the Adobe Reader and Acrobat Cleaner Tool, the Windows Fix-It program remover tools. My antivirus is off and I am running it as administrator.  When I try to reinstall XI, I still get told there is a newer version installed, forces me to close it and reopens the Adobe window in my browser to tell me the install failed and removes the install file I just downloaded.  I am doing all this under a clean boot because I have a program I can't locate that is messing up my installs.  Using the clean boot seems to work nicely.  Are there any other ideas that someone has?  At this point I just want Adobe reader XI back.  The file I am using as install is from this page: Adobe Acrobat Reader DC Install for all versions (where I am not forced into only the choice of the DC version) - Reader 11.0.0.10 English for Windows.

Windows 10 Pro 64 bit

HP Envy 15 with plenty of hard drive space

Thanks for any ideas!

[Pug_luv · Accepted solution]

OK I found the answer.  Went to this file:

C:\ProgramData\Adobe\Acrobat\11.0\Replicate\Security and took ownership.  The installation finished with further problems.