If it is waiting to log in, what are you logging into, a local or a remote system? If it’s a remote system they may be down for some unknown reason. There could be a problem with your ISP carrier. I use to have a lot of issues with dropped service from my old DSL provider. There could be a few other reasons like a possible virus or DoS attack. Run an antivirus program just to be safe if you are not running one currently. If this is a small business with a small network of 1 few users, you may want to reboot your network. If you still have issues provide us with some more details and what you have tried and the results.