Adobe Creative Cloud won't install

Offhand it sounds like an interruption in the download which would have corrupted the file, making it unusable. Some downloads, such as OS updates and upgrades are very large files and are not suited to downloading via Wi-Fi because it is slower. That could be your problem. I suggest trying with a direct wired Ethernet connection. Otherwise, if that is not possible, you may have to try several downloads until you get a clean one that works. If none of this is applicable, then you should look at why there may be interruptions to your internet service. Try resetting your router etc.

I suggest the next step might be to contact Adobe customer service to see what they might offer. Possibly the problem is at their end.