Apparently if I click on 'open' I am agreeing to give access to my data by third parties for all sorts of activities. For starters there is no 'open' to click on. There are random letters below the message and in the blue box which change every time I try to open my account. Presumably if I click on the blue box I am giving the required permission. There is nowhere I can click to refuse this or get rid of this message to unblock my account. I will not be held to ransom like this and intend to wait and see if the message eventually goes away by itself. Thankfully I can access my hotmail account on my phone and laptop (which has Windows 10) without any trouble.