Elements 11: "moving ad" and hang when launching

Moving ad? What are you referring to?

Have you scanned your system for malware?

Hi Chris my computer is scanned regularly using AVG. The advert looks like a bona fide flyer advertising elements eleven and inviting purchase. This shows at the first stage of opening photoshop where the organize/edit/create/share options show. The fixed picture displayed normally is titled "Give tourists the brush off"
What occasionally displays instead of this is the announcement about elements 11 with a colourful slow moving background of balloons, I think., filling the whole picture area of the above usual picture. At this point the cursor shows an hourglass and everything hangs; nothing further can be done on the computer until it is shut down and restarted. It is so frustrating!
I have no other software problems on the machine.