Even with the perfect crack, users faced issues. Here are the historical fixes:

For users playing the SKIDROW release, applying official updates was impossible; the Steam client would recognize the illegitimate files and refuse to patch them. Consequently, SKIDROW released their own packaged versions of the official patches—Update 1 and Update 2. These were not just simple fixes; they required users to replace game executables and specific .dll files with cracked versions provided by the group.

" refers to a specific pirated software package released by the cracking group SKIDROW shortly after the game's 2012 launch

Optimizing Your Experience with Call of Duty: Black Ops II Update 1 and 2