Unable to Authorise DLC [ Edited ]

[Starfall2000]

I got the Mass Effect Trilogy compilation, and recently have finished playing through Mass Effect 2, which I installed via Origin. However, I found that I did not have any of the DLC such as Lair of the Shadow Broker and Arrival. I decided to download them from this page, and I was able to install them, but the game seems unable to process the DLC. Despite logging into the Cerberus Network, I keep getting the 'unable to authorise listed DLC' message, and even after logging back out and logging back in and disabling auto log-in, I can still see no way to manually authorise the DLC. I know the website says downloading the DLC through it may lead to a conflict with an Origin-installed game, but I did not see any other way to get the DLC. I tried to click the 'buy now' button through Origin, but that keeps coming up with a message saying that it couldn't find what it was looking for. What am I supposed to do?

[holger1405]

@Starfall2000

Well, you answered your own question, the DLCs you mentioned must be purchased before they can get authorized.

The problem seams to be that Origin can't connect to the necessary page.

Clear your Origin cache:

 
All settings in Origin (only in Origin not in the games) are back to default settings after this.)

    - close Origin completely. (right click on the Origin symbol in the task bar > close)
    - Press the Windows key and "R" at the same time.
    - Type or copy  "%ProgramData%/Origin" (without quotes) > hit ENTER
    - Delete all the files and folders in the Origin folder, except for the "LocalContent" folder. (The "LocalContent" folder must remain untouched.)
    - Press the Windows key and "R" at the same time.
    - Type or copy "%AppData%" (without quotes)  > hit ENTER
    - Now your Windows explorer should have brought you to your "C:\Users\>your user name<\AppData\Roaming" folder
    - Delate the "Origin"  folder inside the "Roaming" folder
    - In the address bar of your Windows explorer click on the word "AppData".
    - Open the "Local" folder
    - Delate the "Origin"  folder inside the  "Local" folder
    - Restart your PC. > test

If that don't helps restart your router.

If that also not helps, shut down your Windows firewall and disable the real-time scanner of your antivirus software.. (just for testing purpose, don't forget to activate the firewall and the antivirus software later on.)

Should it work after you disabled the firewall, here is a description how to allow a program to communicate through the firewall.

This ports must be open on your Router:

Origin Ports
TCP: 80; 443; 9960-9969; 1024-1124; 3216; 18000; 18120; 18060; 27900; 28910; 29900
UDP: 1024-1124; 18000; 29900
Me3 Port
Port 3659

Clearing your DNS cache. or testing a google DNS could also help.