Creative Cloud stuck at Installation 5%

reset, repair and clean and reinstall per above message.

Make sure Windows is up to date.

if you're already uninstalled anything cc improperly or deleted anything cc, you'll need to clean you computer of cc files*. 

if you have not deleted anything cc and not improperly uninstall anything cc, you should

restart your computer

disable av

retry installing

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*

if you need to clean:

first try, resetting the cc app: To reset the Creative Cloud desktop app, make sure it's in the foreground, then press:

Win: Ctrl + Alt + R
Mac: Cmd + Opt + R

if that fails, try to repair
https://helpx.adobe.com/download-install/kb/creative-cloud-install-stuck.html

if that fails go ahead and uninstall/reinstall per the above link

if that fails, do a clean cc install following each applicable step:

uninstall every cc app 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
check for, and if available, update your os
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 4 here, https://helpx.adobe.com/creative-cloud/kb/creative-cloud-missing-damaged.html)
use the desktop app to install your cc programs/trials

how much free space is on your c drive?

are you trying to install the cc desktop app or are you trying to use the cc desktop app to install some program?  (if it's an adobe program using the cc app and there's 1gb or more free space on c, turn off your av and retry.)