Most Common problems related to Black Ops 2. Most solutions are here and more to be updated.
#1 Call of Duty Blacks Ops 2 Crash Fixes
All right, there can be multiple reasons for your game to crash. Reasons for crashes and their possible solutions highlighted by Treyarch are as follows:
If you are getting a crash while in the lobby, then make sure that you check that it has Nuketwon in it or not. If you have pre-ordered the game, you will be fine otherwise, join some other lobby.
Make sure that your on-board sound device and PCI sound card aren’t enabled at the same time (disable one). The crash can also occur due to sound drivers conflict so make sure that you are using the up-to-date drivers.
Your game can crash if you try to change resolution while live streaming.
If you get a team error after selecting update when prompted with a “Game Settings Have Changed” message. Launching the game again will resolve this.
You may also want to runs some installers manually to avoid random crashes. Exit Steam and run the following installers:
..\Steamapps\Common\Call of Duty Black Ops II\redist\vcredist_x86.exe
…\Steamapps\Common\Call of Duty Black Ops II\redist\DirectX\dxsetup.exe
#2 Black Ops 2 Error – Could not load default asset ‘fonts/720/consolefont’ for asset type ‘font’
It is language related so if you are Polish or Russian, change the English language to local to resolve the issue.
#3 Black Ops 2 Error – Dependency Failure Error When Launching Game
It can occur due to incomplete installation of the game. Installing all components of the game (Singleplayer, Multiplayer, & Zombies) before launching can fix the issue.
#4 Black Ops 2 Crashes At Boat Scene in the Second Mission
This issue is specifically related to Nvidia drivers. You can follow this link for the fix.
#5 Black Ops 2 – DirectX Encountered An Unrecoverable Error
You can try out the following to fix this issue:
Verify your cache
Make sure no other background programs(like anti-virus) are running, you might need to temporary remove them.
Re-install your graphics driver
Re-installing BLOPS 2 may work as a last resort.
#6 Black Ops 2 Crash – Dependency Failure
You should try the solutions mention in #1 to resolve the issue.
#7 Black Ops 2 Decryption Code Error
This error is related to incomplete installation. Make sure that all the components of the game (SP, MP and Zombies) have been fully installed before you launch the game.
#8 Black Ops 2 Error During Update
If you have pre-loaded the game, then I will recommend that you uninstall the game and proceed with a fresh install. It’s worth of a shot if nothing else is working.
#9 Black Ops 2 Freezes on Launch
If you have an Nvidia card then you should give these drivers a go. Also make sure that you are not running the game on Windows XP as Black Ops 2 doesn’t support it.
#10 Black Ops 2 Cut-scene Lag/Stuttering
It has no technical aspect. You just need to lower down your graphics (try depth of Field first) a bit to make the experience smoother.
#11 Black Ops 2 Steam Download Stuck on 96% Or Like That
If your download is not proceeding further, and it’s been ages, you should try restarting Steam and your PC. This can fix your problem, and the download will continue.