So I bought Assassin's Creed 2 Deluxe Edition of Steam but when I try to play it I get an Error Coder (83) I have tried to verify the game cache but it did not fix the problem. 
 
This also happens with Battlefield: Bad company 2. 
 
What can I do to fix it? 

Buy a conosole? No sorry... I don't know.

" Buy a conosole? No sorry... I don't know. "

  T__T  
 
Anyone?        

I know this is very simple, but, have you tried restarting Steam? 
 
You might want to put in a ticket with Valve.

Restart steam. If that fails, try and reinstall the game.
 
Either that or Steam is just being a little bitch at the moment.

Okay, I reinstalled the game and get to the Ubisoft launcher and it says '' An internet connection is required to play this game. Failed to connect to the Ubisoft master servers. Please verify that your internet connection is functional and try again.''

" Okay, I reinstalled the game and get to the Ubisoft launcher and it says '' An internet connection is required to play this game. Failed to connect to the Ubisoft master servers. Please verify that your internet connection is functional and try again.'' "

@NekuSakuraba said:

" Okay, I reinstalled the game and get to the Ubisoft launcher and it says '' An internet connection is required to play this game. Failed to connect to the Ubisoft master servers. Please verify that your internet connection is functional and try again.'' "

All Ubisoft games must be connected to the internet AT ALL TIMES in order to play them on the PC as this is their form of DRM. If you lose your interent connect during the game you will have your session terminated immediately and not be given the option to save. It's messed up.

@ZombiePie

@NekuSakuraba said:

" Okay, I reinstalled the game and get to the Ubisoft launcher and it says '' An internet connection is required to play this game. Failed to connect to the Ubisoft master servers. Please verify that your internet connection is functional and try again.'' "

All Ubisoft games must be connected to the internet AT ALL TIMES in order to play them on the PC as this is their form of DRM. If you lose your interent connect during the game you will have your session terminated immediately and not be given the option to save. It's messed up.

Yeah, the thing is I am connected to the internet yet lit still will bit work.

" @NekuSakuraba

@ZombiePie

@NekuSakuraba said:

" Okay, I reinstalled the game and get to the Ubisoft launcher and it says '' An internet connection is required to play this game. Failed to connect to the Ubisoft master servers. Please verify that your internet connection is functional and try again.'' "

All Ubisoft games must be connected to the internet AT ALL TIMES in order to play them on the PC as this is their form of DRM. If you lose your interent connect during the game you will have your session terminated immediately and not be given the option to save. It's messed up.

Yeah, the thing is I am connected to the internet yet lit still will bit work.

Will not work* sorry I can't edit, on mobile. "

" @NekuSakuraba said:

" @NekuSakuraba

@ZombiePie

@NekuSakuraba said:

" Okay, I reinstalled the game and get to the Ubisoft launcher and it says '' An internet connection is required to play this game. Failed to connect to the Ubisoft master servers. Please verify that your internet connection is functional and try again.'' "

All Ubisoft games must be connected to the internet AT ALL TIMES in order to play them on the PC as this is their form of DRM. If you lose your interent connect during the game you will have your session terminated immediately and not be given the option to save. It's messed up.

Yeah, the thing is I am connected to the internet yet lit still will bit work.

Will not work* sorry I can't edit, on mobile. "

The servers are unreliable. You're in murky waters. You can always try to mod, as that seems to be the best and easiest solution. "

" @Jeust said:

" @NekuSakuraba said:

" @NekuSakuraba

@ZombiePie

@NekuSakuraba said:

" Okay, I reinstalled the game and get to the Ubisoft launcher and it says '' An internet connection is required to play this game. Failed to connect to the Ubisoft master servers. Please verify that your internet connection is functional and try again.'' "

All Ubisoft games must be connected to the internet AT ALL TIMES in order to play them on the PC as this is their form of DRM. If you lose your interent connect during the game you will have your session terminated immediately and not be given the option to save. It's messed up.

Yeah, the thing is I am connected to the internet yet lit still will bit work.

Will not work* sorry I can't edit, on mobile. "

The servers are unreliable. You're in murky waters. You can always try to mod, as that seems to be the best and easiest solution. "

How can I get it to work without mods or anything? It should be able to tell I am using the internet. "

" @NekuSakuraba said:

" @Jeust said:

" @NekuSakuraba said:

" @NekuSakuraba

@ZombiePie

@NekuSakuraba said:

" Okay, I reinstalled the game and get to the Ubisoft launcher and it says '' An internet connection is required to play this game. Failed to connect to the Ubisoft master servers. Please verify that your internet connection is functional and try again.'' "

All Ubisoft games must be connected to the internet AT ALL TIMES in order to play them on the PC as this is their form of DRM. If you lose your interent connect during the game you will have your session terminated immediately and not be given the option to save. It's messed up.

Yeah, the thing is I am connected to the internet yet lit still will bit work.

Will not work* sorry I can't edit, on mobile. "

The servers are unreliable. You're in murky waters. You can always try to mod, as that seems to be the best and easiest solution. "

How can I get it to work without mods or anything? It should be able to tell I am using the internet. "

Not if their servers are down.   The connection with their servers isn't reliable. "

" @Jeust said:

" @NekuSakuraba said:

" @Jeust said:

" @NekuSakuraba said:

" @NekuSakuraba

@ZombiePie

@NekuSakuraba said:

" Okay, I reinstalled the game and get to the Ubisoft launcher and it says '' An internet connection is required to play this game. Failed to connect to the Ubisoft master servers. Please verify that your internet connection is functional and try again.'' "

All Ubisoft games must be connected to the internet AT ALL TIMES in order to play them on the PC as this is their form of DRM. If you lose your interent connect during the game you will have your session terminated immediately and not be given the option to save. It's messed up.

Yeah, the thing is I am connected to the internet yet lit still will bit work.

Will not work* sorry I can't edit, on mobile. "

The servers are unreliable. You're in murky waters. You can always try to mod, as that seems to be the best and easiest solution. "

How can I get it to work without mods or anything? It should be able to tell I am using the internet. "

Not if their servers are down.   The connection with their servers isn't reliable. "

So how do I know when they are down or if it is my problem?  "

It's a known problem and has to do with some Software Firewall conflicts.   The simplest solution, aside from disabling/uninstalling your Firewall software, seems to be to start Steam in Offline Mode, by unplugging your LAN cable as before you start Steam then running the game.  Once this is done for each gaming giving your the unlock error (83), it shouldn't happen again when you start Steam as normal (with the LAN cable plugged in).

" It's a known problem and has to do with some Software Firewall conflicts.   The simplest solution, aside from disabling/uninstalling your Firewall software, seems to be to start Steam in Offline Mode, by unplugging your LAN cable as before you start Steam then running the game.  Once this is done for each gaming giving your the unlock error (83), it shouldn't happen again when you start Steam as normal (with the LAN cable plugged in). "

" Okay, I reinstalled the game and get to the Ubisoft launcher and it says '' An internet connection is required to play this game. Failed to connect to the Ubisoft master servers. Please verify that your internet connection is functional and try again.'' "

" @NekuSakuraba:   Welcome to the wonderful world of Ubisoft in Windows.  UGH.  It's probably their servers being down. "

" @SeriouslyNow said:

" @NekuSakuraba:   Welcome to the wonderful world of Ubisoft in Windows.  UGH.  It's probably their servers being down. "

I had a friend try his copy out and it worked. "

" @SeriouslyNow said:

" @NekuSakuraba:   Welcome to the wonderful world of Ubisoft in Windows.  UGH.  It's probably their servers being down. "

I had a friend try his copy out and it worked. "

" @NekuSakuraba said:

" Okay, I reinstalled the game and get to the Ubisoft launcher and it says '' An internet connection is required to play this game. Failed to connect to the Ubisoft master servers. Please verify that your internet connection is functional and try again.'' "

All Ubisoft games must be connected to the internet AT ALL TIMES in order to play them on the PC as this is their form of DRM. If you lose your interent connect during the game you will have your session terminated immediately and not be given the option to save. It's messed up. "

You may have a problem with your internet settings. I've read that the game is very strict with that stuff. I also found this bizarre solution post:  

If your not able to play Assassins Creed II due to DRM other problems check here

The Ubisoft Launcher fails to authenticate the game. It seems to believe that Im offline.

"An internet connection is required to play this game. Failed to connect to Ubisoft master servers. Please verify that your internet connection is functional and try again."

Solution: 
After having uninstalled the following programs I was able to play AC2.

Widecap http://www.widecap.com/
WTFast http://www.wtfast.com/
Python 2.6 x64 http://python.org
Google Apps Engine http://google.com

An educated guess would be that Widecap and WTFast were the culprits.
Of course if you guys like you could test this reproduce this error.

Im only sharing this because Im sure Im not the only one that had this problem.
A lot of MMO gamers install widecap and WTFast, in order to use services such as lowping.com

Other Possible Solutions
NOTE: If you are running in Windows Vista or Windows 7, please completely exit Steam, and right-click on the shortcut which you use to launch Steam and select "Run as Administrator."

You may need to manually run secondary installers required by this game.

Exit Steam entirely.

Browse to your Assassin's Creed 2 installation folder (Usually C:\Program Files\Steam\steamapps\common\assassin's creed 2\)

You will need to run the following installers:

...\steamapps\common\assassin's creed 2\redist\DirectX\DXSETUP.exe

...\steamapps\common\assassin's creed 2\redist\GameLauncher\UbisoftGameLauncherInstaller .exe

...\steamapps\common\assassin's creed 2\redist\VCRedist\vcredist_x86.exe


Then, restart your computer and test the issue again.    

Turn off your firewall and exit it. See if it works or not, it might be just a  firewall problem. If not, their servers might be down.

Does it do the same when you launch the exe directly form your steamapps folder? What about when doing so and choosing Run as Administrator?