FB / Google cookies asking for passwords and ripple effect problem

[Krystal n chips]

I tend to go on line early and check various sites. All was well, initially, until I went onto FB....get a message asking for password confirmation (never had this before) so I decided to wait until later to respond to the option to for a reset and a one off code sent to my email ...having now done so, I'm still waiting.

However, it was what followed that concerns me.

When I went back to various sites, including this one, I was asked to log in and use my password. This happened on at least five sites which I remain logged into.

I declined to accept FB " accept all cookies" as I do with all sites, other than those I have no choice in accepting as they are deemed essential.

But as I say, what concerns me is the apparent "ripple effect" which commenced after FB asked for my password.

Any, non techie speak please, explanations would be appreciated.

An update. The FB issue has been resolved, but, I am still concerned as to why so many, seemingly unconnected, sites, suddenly asked for password confirmations and prevented me from logging in until provided. There was a Windows update later, if this has any relevance ?