Hey, this is Lordvader77. If you read the above, you'll know that I was hacked. As stated, a guy named Guardian of Hell sent me a message that redirected me to a website that looks exactly like a normal Steam website. DO NOT put your information in there. If you do put your info in this, the hacker will access your account from his PC and lock you out. He will most likely change your password so that you can not get back in. Through your account he can also gain access to your email, so you will want to make sure that your email is secure and that your password is different then your Steam password. My advice is to close Steam and restart. When I restarted, I was prompted that I could try and retrieve my info. A message will be sent to your email that has a link to a Steam help page. DO what it says and file a report, detailing what happened and who you believe did this to you. The Valve employees will get back to you ASAP. You will need a CD key, so that you can prove that you were, as they say, "hijacked".
The moral to this is NEVER EVER EVER EVER EVER give away your Steam information, that being your username and password, especially to people you do not know. I did not do this and now I am locked out until Valve lets me back in. Take care and be safe