wow.. i've been at it for days. Fixed.
I tried a lot of things... each change, I tried again.
There was no uninstall even though error said I needed to uninstall first. I uninstalled panda antivirus.. no help. disabled windows defender... no joy. I deleted everything in my registry that referred to window blinds... seems stuff was inserted even though it wouldn't install. still wouldnt work.
I looked into my program files(x386) and saw a window blinds folder... deleted that. tried again.
it worked
i hope this helps someone.
Windows 10 64x owner