Hi auntyneddy
I am only a member sorry, but I think it is not you, or your pc.
It is more likely a server update (either hosting or database servers) which were been updated perhaps
This will happen from time to time, and the way to tell, is if logins work normally after say 30 minutes
I logged in from tapatalk on mobile, without issue, so if you try now, you should be able to login and put normally
I'm sorry if I am wrong
Many thanks
John