Here's a quick one. I've been struggling with getting Adobe Illustrator (Creative Cloud) to run properly with user-level privileges. It would often freeze and crash. After making the changes below, Illustrator now works quite well. My gut tells me that the key was the first step.
* Grant the INTERACTIVE user full access to C:\Program Files\Adobe\Illustrator.
* Make sure any pending Windows updates are installed.
* Make sure that anti-virus software (e.g. McAfee) is on the latest version.
* Login with an Administrator account and make sure any pending Adobe Creative Cloud updates are installed.