Deleting all internet cookies/history/passwords for the steam client browser, my local PC's browser, uninstalling/re-installing steam, checking port forwarding on my router, etc. I created a dummy account and was able to authenticate without any issues. I verified it was an account issue as I tried logging in even from my cell phone's browser without being connected to wifi so I could be sure I was using the cell network to rule out local network or client issues. Please review our FAQ on programs that may interfere with Steam. Other programs on your computer may be conflicting with Steam. Please review our Troubleshooting Network Connectivity FAQ to ensure that your network configuration is compatible with Steam. I could not submit a support ticket due to this problem as it would again try to do the login verification and say it could not reach a login server. The Steam Client accesses your Steam account differently than your web browser does.

I'd authenticate and put in my steam guard code but it would just go back to the login page (steam client would authenticate and show me logged in). In fact, in my case I could not even log in to steam via a browser. I exit Steam, restart it and sign in again and everything is fine again, until that error comes back (which may be hours, or a day or two later). I was able to log in to steam from the client but my wishlist was inaccessible, I could not buy games due to the login verification popping up and failing, etc. Im now using google browser to open steam because my steam program keeps saying 'Verifying login information' and then it fails. The first thing that you can do is fully sign out of your Steam account, and log back in. 1 mikey 7:38am Originally posted by Wasteofskin: I've been getting that occasionally for a while now. In case anyone else is searching the web and finding all the solutions provided didn't work for them, I had a completely separate resolution: I had to remove steam guard and re-add it.

Steam verifying login information error