Beginning with the Mehrunes' Razor release, all official downloadable content packages will require the Xbox 360 Title Update, or Patch for PC in order for them to be enabled during game play. This change does not retroactively effect the previously released content packs (Horse Armor, Orrery, Wizards Tower, and Thieves Den), which will continue to work regardless of which version of the game you have. If you have downloaded the Mehrunes' Razor pack, and it is not enabling correctly when you load your game, please verify that you have version 1.1.511 of Oblivion (check on the Title Screen for PC, or under Video Options for Xbox 360).

The Title Update for 360 can be obtained by connecting to LIVE and launching the game.
The patch is availabe for PC, http://www.gamesas.com/eng/patches.php

Further Addendum Concerning DLC's and Knights of the Nine

Downloaded Content Installations can be problematical for some folks. Here are some tips

Background apps, can interfere with installations. CTFMon.exe is one of the better known ones for causing problems. As always, it is best to install under a Clean Boot, http://support.microsoft.com/kb/331796. Even so, you may still have to kill CTFMon.exe in the Task Manager after a clean boot. CTFMon is a program for alternative input, like Speech Recognition, This process is safe to shut down if it is running. A reboot will bring it back, even if you don't want it to.

Worse, case, Safe Mode with Networking Support (F8 at Boot) works for some. However, your PC is naked to the Internet. Most things that will attack your system will not have a way in if you do not open a web browser, but you are still not protected unless you are behind a hardware firewall. Even then, only be online long enough to validate.

If that still does not work, then there is the Telephone Method which you can choose during the install process.

However, for some, the DLCs will just not activate. There is no known reason why some can not get them to work. And, Vista and 64 Bit versions of any MS OS are not compatible with the DLC Installation. You can get a refund if you can not install or use them and you recently purchased the contect. Then, get the Direct2Drive download or the Retail CD version. Both will install on 32 bit or 64 bit Windows XP/Vista (Windows 2000 also) and either will work with the game no matter how you originally purchased it.

The Direct2Drive and the Retail CD version uses a different installer and licensing mechanism so it is successful alternative for folks who have issues with the DLC's. That may be the best solution in the long run.

Direct2Drive has a version without all the official Plug Ins included, and one with all of them.

http://www.direct2drive.com/2012/product/Buy-The-Elder-Scrolls-IV:-Oblivion----Knights-of-the-Nine-Download

http://www.direct2drive.com/2103/product/Buy-The-Elder-Scrolls-IV:-Oblivion----Knights-of-the-Nine-Downloadable-Content-Collection-Download

DLC FAQ's
Graciously Provided by http://www.gamesas.com/bgsforums/index.php?showuser=96830

1. What does "DLC" mean?

"DLC" stand for "downloadable content". These are official additions to the game such as new armor, quests, dungeons and npcs to interact with.

2. Where can PC users get DLCs?

PC users can purchase DLCs online from http://obliviondownloads.com. Or if you prefer you can purchase the Knights of the Nine Downloadable Content Collection. This retail disc includes the following DLCs: Horse Armor Pack, Orrery, Wizard's Tower, The Thieves Den, Mehrune's Razor, The Vile Lair, Spell Tomes and Knights of the Nine.

3. Where can XBox 360 users get DLCs?

Xbox 360 users can purchase DLCs for their game through Xbox Live in the http://www.xbox.com/en-US/games/t/theelderscrollsIVoblivion/.

4. Do I have to have an Xbox Live Gold account to buy DLCs or download patches?

No, you can do both using a free (Silver) account.

5. Where can Playstation 3 users get DLCs?

Initially, http://www.gamevideos.com/video/id/8905, soon afterwards however, an article came out refuting that claim, in which http://ps3.ign.com/articles/762/762882p1.html. The article added that "it's because the designers haven't actually tested the PlayStation Network Store and the mechanisms for delivering content".

Later in an http://www.shacknews.com/featuredarticle.x?id=236&page=3 memory requirements were again mentioned as an issue to consider (this time by Pete Hines himself):

"Shack: So there will be no downloadable PS3 content at launch?

Pete Hines: I don't think so, no. Any one of those we could probably release [for PS3] and be okay, but we have to make sure everything's going to work together with memory requirements and other factors and so forth. It's just going to take us a little while to figure out."

Whatever the reason (or reasons) the PS3 has yet to receive the remaining DLCs: Horse Armor Pack, The Orrery, Wizard's Tower, The Thieves Den, Mehrune's Razor, The Vile Lair, Spell Tomes and The Fighter's Stronghold.

Hopefully these will be added in the future.

6. I recently bought the Game of the Year Edition, but some of the DLCs seem to be missing.

The Game of the Year edition includes the core game, Knights of the Nine and Shivering Isles.

It does not include any other DLCs, it was the the retail Knights of the Nine Downloadable Content Collection for the PC that included all of the other DLCs up to the time it was released.

8. What about The Shivering Isles? Isn't it a DLC?

Yes, but it's generally considered a full expansion pack. It has an excellent FAQ already which can be found http://www.gamesas.com/bgsforums/index.php?showtopic=672051.

Patching

As always, best to do this under a Clean Boot too. And, it does take 20 to 30 minutes to complete. The patching process will appear to hang several times, inlcuding the beginning. If you mess with it, even move the window, it could go non reponsive and you will have to start over. Walk away if you have to

http://support.microsoft.com/kb/331796

Important Note, with the Knights of the Nine Boxed CD, the patch provided is for North America. If you have a localized version, then get the correct patch from link above. With the English versions, it is not always clear which one to get, so try the other one if needed.

If you're using the Direct2Drive version of the game, there is a special digital distribution version of the patch available http://www.direct2drive.com/3/376/product/Buy-The-Elder-Scrolls-4:-Oblivion-w/-Manual-Download (Look for the red text)

Note, it matters not where you get the plugins (DLC's, Retail CD, D2D) you need to patch according to where you got the game from originally.

Common issues are "Old File Not Found" errors. This is because you have the incorrect patch, or are using a no disc crack. If the latter, you have to reisntall the game. Then patch it. to uninstall and reinstall cleanly, follow this:

1. Back up any Saves to another location (see #4).
2. Run the Uninstaller.
3. Find the Program Files/Bethesda Softworks/Oblivion folder and manually delete it.
4. Find the <>/My Documents/My Games/Oblivion folder and delete it. Note, this is where your Saves are, so this is your last chance to back up.
5. Empty the Recycle Bin.
6. Do a http://support.microsoft.com/?scid=kb;en-us;331796
7. Install the Game and then Patch it. Use the following order:

Oblivion
Official Mods
Knights of the Nine
Shivering Isles
SI Patch Only

If you do not have SI, then you only need the 1.2 Patch

Note, you only patch once and at the end. And, if you have GOTY, you need no Official Patches

Then:
Community mods and patches.

The game freezes for a few minutes when you Sleep to Level Up.

This is a result of something added to the INI by the new patch.

When you Sleep to level up, the game will freeze for a few minutes before you can choose which Attributes to modify for that Level Up. If you wait a bit, the game will allow you to continue. As you level up, the wait takes less and less time.

However to fix it, do this

Find the INI file in My Documents/My Games/Oblivion, look for the file called Oblivion*.

If you are a little concerned about what you are doing, make a back up copy of the file first. (Right Click and Drag will do that for you)

Open it in Notepad and find this line: (You can use the Edit Menu and search for Vault as this is the only line that has that word)

STrackLevelUpPath=\\vault\TES4\LevelData\

And make it look like this

STrackLevelUpPath=

Close and save the INI file.


*Do not use the Default INI file in the Install directory, changing that is very risky. I am not even going to tell you where that is.