If you have McAfee and Windows, you need to do the following things to get the updater to work properly. 1. Find the Adobe Creative Cloud exe file in Windows explorer. It is probably in the following path- Program Files (x86): Adobe: Adobe Creative Cloud: ACC. Once you find it, minimize it for use after steps 2 and 3 are done. 2. Disable McAfee Firewall and Real Time Virus Scan. Do it for at least 30 minutes if you have a time option. 3. Go into Task Manager, and make sure you shut down everything running for Adobe. This includes CEF Helper, IPC Broker, everything. You may not see it as a running program, but you will see it in processes or details, depending on the version of Windows you have. You can right click on anything on that list and either end process or end task. 3. Once that's done, run the Adobe Creative Cloud executable as an Administrator (right click on the file, select run as Administrator) 4. It will fire up all the apps you just closed, but now they aren't encumbered by McAfee. 5. Update what you need to. 6. Resume your Firewall and Virus scan programs. I just did this after double checking the whole Host and Digital Cert stuff that is linked to above this. None of that worked. Something about shutting down every Adobe process running on my machine, then disabling McAfee, seemed to help them all get through once they restarted without McAfee running. The key is shutting down every Adobe process. Good luck.
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