Steam Error: Account Expired - Games

I recently let my friend use my steam account for about half an hour. I installed steam on his computer and logged into my account. I installed Garrysmod and Half Life 2 and he played them for A bit. He logged off, and never did anything else on steam. I go on today, and in the middle of playing Trackmania United, I get an error message that says "STEAM ERROR: Account expired, please re-enter password." So I re-entered my password, and it said "ERROR: account does not exist or password is incorrect." So I re-entered it again a couple more times, same thing. I reset steam and it asked me to log on, same thing. Account does not exist. I kept trying for about an hour and it said "Steam - Waring; Connection to steam servers lost." and it gave a link to troubleshooting tips and crap. Is there something wrong with the steam servers? Or am I banned? I was able to install and play my account on the computers at my school, and play Gmod with HL2 and TF2. I never had any problems. My friend never had my account information, I merely logged in and let him play Gmod for half an hour. I went home, and he logged off my account and went onto his, and his account had preloads" of the games I had on my account, but he never opened them. Could someone help me or tell me whats wrong? tl;dr Let friend play account, got error message that account expired.

-Snip- Jumped to conclusion before fully reading. EDIT: Posible he hada keylogger on his PC and someone ELSE stole your account.

Just do a fresh install of steam. And get your account stuff off school computers.

[QUOTE=Samuelgames;19965898]You should be learning instead of playing Team Fortress 2 in your school's computers, anyway, try to reset your password by clicking the I lost my Password button[/QUOTE] 1. It was during Drafting class and I finished all my work. 2. Don't you think Ive tried that? I couldn't answer the question because it said "what did steam support last change your passphrase to?" how am I supposed to answer that? I don't know what my password is.

E-mail steam support directly, giving them your steam ID, last known password and proof of purchase of at least one game on your account.

[QUOTE=CoolCorky;19966288]E-mail steam support directly, giving them your steam ID, last known password and proof of purchase of at least one game on your account.[/QUOTE] Thank you for the help, Ill try that. I have an activation code from The Orange Box, would that work?

If by activation code you mean CD-key, then yes.

[QUOTE=Diealready;19966399]Thank you for the help, Ill try that. I have an activation code from The Orange Box, would that work?[/QUOTE] Yes that is how I got my account back after it got hacked. [editline]01:08AM[/editline] [QUOTE=Diealready;19966221]1. It was during Drafting class and I finished all my work. 2. Don't you think Ive tried that? I couldn't answer the question because it said "what did steam support last change your passphrase to?" how am I supposed to answer that? [b]I don't know what my password is.[/b][/QUOTE] Wait is this what you are trying to say?

[QUOTE=CoolCorky;19966288]E-mail steam support directly, giving them your steam ID, last known password and proof of purchase of at least one game on your account.[/QUOTE] Don't email them directly. Steam set up this for a reason: [url]https://support.steampowered.com/[/url] Make an account and push the little "ask a question button near the top.

why would you even log into steam on a school computer, do you know how much shit is riddled on those types of computers.