I have spent the last 3 days--and I mean 12 hour days - trying to solve the problem with my CC 2018 update. Not only did this last update wipe out my ability to use my trusty CS3, but I have had every problem you can think of in being able to use the App! It started with not being able to link png and jpeg images to the app to not being able to install and use CC2018 at all!! I read and tried everything but nothing worked. The last problem I was dealing with was being stuck at waiting. So here is what solved my problem:
I had come across suggestion to rename the OOBE file but never saw info on how to do this until now. That is what solved the problem. Here is the link to those instructions:
In addition, don't forget to first uninstall any previous downloads. And I also disabled my Firewall and ran the download as an administrator (right click, run as administrator). These last things may not be necessary but worth including.
I hope I can save even one person from going through the immense frustration (mild word) I just went through with this update. It has totally changed the way I feel about Adobe.