you should install the cc app on your windows drive. you can install the applications themselves where you want.
It is installed on my windows drive.
i don't understand why you edited your registry then.
in any case, as long as you're using the default install:
uninstall everything cc including preferences, https://helpx.adobe.com/creative-cloud/help/uninstall-remove-app.html
then uninstall the cc desktop app, https://helpx.adobe.com/creative-cloud/help/uninstall-creative-cloud-desktop-app.html
clean your computer of cc files per http://www.adobe.com/support/contact/cscleanertool.html
restart your computer (don't skip this)
reinstall the cc desktop app, https://creative.adobe.com/products/creative-cloud.
if you're unable to install the cc desktop app at this stage, use an administrator account (solution 3 here, https://helpx.adobe.com/creative-cloud/kb/creative-cloud-missing-damaged.html)
use the desktop app to install your cc programs/trials
I edited the registry because I have my OS installed on a small 64 6gb drive and I don't want my default install location as that drive. Which is a pretty standard thing when you get an SSD as your OS drive that's that small.
And I've already done your solution along with Adobe tech support doing it as well.
your windows drive is not the same as your os drive?