I could not log in for days, but Steam considered me already logged in also.
I had to log out of the steam interface, then when I opened it again, I told it I had lost my password.
it allowed me to reset it, and then I logged into steam again and it let me go thru and sign in on a browser, and the GameGuru website.
It was pesky for sure.
Intel(R) Core(TM)2 Quad CPU Q6600 @ 2.40GHz, 2400 Mhz, 4 Core(s), 4 Logical Processor(s), 8gb RAM, Nvidia gtx660, Windows 7 Pro 64bit