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
Thank you for your reply! So, I tried to do the first step and uninstall all the apps through cc; BUT I cannot because creative cloud itself won't open. I attached an image to show you what it's doing. The "here" button doesn't work either.
So, I can't even uninstall the apps because creative cloud can't open?!
Please let me know what I should do! Thank you!
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see if you can uninstall the cc programs (and then the cc desktop app) using your control panel.
if you can, then clean per step 3 above and continue through the steps.
if you cannot, using a browser that allows popups and cookies, contact adobe support during pst business hours by clicking here and, when available, click 'chat', http://helpx.adobe.com/x-productkb/global/service-ccm.html