I was trying to figure out why Steam kept refusing my login attempts. I checked that I was using the right password and username. I checked that caps lock was not on. And finally I did a quick search and found this very useful site that shows that at the time of this posting, Steam is down. http://issteamdown.com/ So if you, like myself are wondering why you cannot use Steam in any way, you can check that URL to see if it is specific to you or if Steam is not working at the moment.