Really weird stuff happening with forum

[gadgetman]

I think it might be a virus rather than a forum issue. I've taken a screen shot but don't seem to be able to use webbrowsers. It says
The server d19pnrgxiqp2x9.clouddont.net is askin for your username and password. The server reports that is from Windows has detected some suspicious activity. Please login and verify your identity or call us immediately on our helpline 099749607.
Then has a space for username and password.
@gadgetman what do you think?

Looks like you have acquired a redirection addin to your browsers. Download and run malwarebytes, run a virus check. If that doesn't work with chrome then uninstall chrome and reinstall it as it often hides the addins. The other browsers normally show the addin OK for you to disable/remove.