Can't install Reader "Already installed"

Question

So I had a problem with Reader where it gave me an error message saying ReaderSomething.msi (I don't really remember the name) could not be found. So I tried to uninstall reader to then install it again. Though when I tried to uninstall, some files did not want to be removed, in the folder C:\Program Files (x86)\Adobe\Reader 11.0\Resource\CMap\  Identity-H and Identity-V. I tried to remove them myself, but for some reason they, or the map Reader 11.0 cannot be removed. I tried to re-install Reader by downloading the latest ver from the website, but when I tried to install it says that reader already is installed, but it isn't. This is very annoying. I have tried to remove every single reader file, including the ones in ProgramData. But still it says reader is already installed. A screenshot won't help, because it's just the installer that says ☑ Already installed
What do I do to make this work? I am using Windows 7 64-bit.

Answer 1

A simple batch, well why didn't I think of that myself...
A slight edit of the file could work for future problems too..
@echo off
@setlocal enableextensions
@cd /d "%~dp0"
echo.
echo Please paste the full key path.
set /p key=
subinacl /subkeyreg %key% /setowner=users
subinacl /subkeyreg %key% /grant=users=F
subinacl /subkeyreg %key% /setowner=administrators
subinacl /subkeyreg %key% /grant=administrators=f
reg DELETE %key% /va /f
cls
echo.
echo Key deleted.
pause
exit
Not sure if that would work though...
Anyways, thank you very much. The file deleted the key (though it's still shown in the registry, but who gives a damn) I could install Reader and it works perfectly!
And I must say, thanks again for the fast and great support!