Bob Hobden wrote:

Check your User Name is still correct, it's case sensitive I believe, and
then delete the remembered password and re-enter the correct one.
Let us know if this doesn't cure it.


That could be the problem. Sometimes the ISP just refuses access.
Going online and resetting you password might do the trick.

It is highly unlikely that two computers are wrong.

By be able to access newsgroups proves that your connection is OK.