Please make sure that the Windows host file do not have Adobe entries.
Here is a duplicate thread If Lightroom is included with creative cloud membership, why is it asking for a serial number?
Let us know if that helps
I have checked my hosts file and there is no adobe entry.
I have also started the applications manager which did an update first and also installed some CreativeCloud sh-it. I emediately uninstalled your cloud stuff. The applications manager showed Lightroom CC and Adobe Acrobat. As i wrote in my initial post, I don't have the CC version. I have Lightroom 6 Full Version, Standalone whatever you call that. (Acrobat is not installed on my machine. Not even the reader...)
I think the problem is that the auto updater has updatet my full version to the cc one. Is my key really working for bouth versions or could this cause the problem? Unfortunately I have signed out on the applications manager. If I start Lightroom now, I have to accept Lightroom CC terms which I WILL NEVER!! The reason I bought the full version on CD/DVD was because I will never use the cloud and I will also never pay monthly subscriptions for software. If CC is the only option, you have lost a long term customer.
I have uninstalled Lightroom now and I will reinstall from disc tonight. After that, I will turn off any Adobe updates and see if this solves the issue.
In a few days I let you know if this solved the problem.