BLANK Cloud Screen http://forums.adobe.com/message/5484303 may help
-and step by step http://forums.adobe.com/thread/1440508?tstart=0
1st and 3rd methods you proposed are out of question, I don't have anything installed on my PC, I just can't complete the purchase in the webpage https://creative.adobe.com/join/photography/annual_pmt
Also no special chars in my account. Checked it.
As you can see in the video above, the screen isn't completely blank, the footnote is still there.