The Bioware forums can show you how to update the following was taken from these forums.
You may go here to read them.
The one rule here: Empty your override file. Look in 'My Documents/Neverwinter Nights 2' to find your override folder.
The first step is to install the game and any expansions you may have. Then update.
The latest version of the game is 1.23. The easy way to update is to simply press the 'Update' button in the Main Menu.
If that does not work, you need to go the manual update route. That can involve downloading a sequence of patches and applying the patches to your game install using the NWN2 patcher:
You can find most of the patches here:
These are sorted by language: http://nwvault.ign.com/View.php?view=NWN2A...s.Detail&id=230
Some of the patches are missing from the above link. Check here for more patches:
Breakdown of the file names:
Depending on what type of game you have installed (the language version, which games), you will be using different patches.
nwn2 = the game
pc = You only have the Offiicial Game installed. No expansions
pcx1 = You have expansion number one (Mask of the Betrayer) installed. But not expansion two installed.
pcx2 = You have expansion number two (Storm of Zehir) installed. It doesn't matter whether or not you have expansion one installed.
english = The language version of your game.
From1121295 = This is the starting version of the patch.
To1131407 = This is the ending version of the patch.
For 'From' to 'To' (see above), you need to connect all the points together.
As an example, I am going to list all the files that I need to patch the game. I have the OC, MotB and SoZ installed and version is English. The version number when I have all this installed is: 1.20.1541
So to get from version 1.20.1541 to version 1.23.1765, I need to download and install these (notice that they a numerically sequential):
So I would download all those patches (note: I had to go to both pages to get those files) and the patcher (link near the top) to patch the game.
Neverwinter Nights 2 Patch 1.23
Neverwinter Nights 1.69 Patch Download
The ultimate source of patches & addons for Neverwinter Nights 2. Download auto-updater version 1.08 for PC (1MB) Patch 1.12 (Macintosh) Download patch 1.12 (61MB) List of changes (english forum) List of changes (german forum) Patch 1.06 (PC) Download russian update 1.04 to 1.06 (101MB).