, and ensure all relevant DLC packs (Warzone, Multiplayer, Shared Content) are marked as "Installed".
If the source file is damaged, no amount of troubleshooting will fix it. Delete your current setup file. 0x01 a critical installation file is missing
Here is a comprehensive guide to understanding why this happens and how to get your software up and running again. What Causes the 0x01 Error? , and ensure all relevant DLC packs (Warzone,
If provided (MD5/SHA1), compute:
Since 0x01 often points to missing Microsoft runtime files, manually download and install: 0x01 a critical installation file is missing
If you are installing onto a hard drive that is failing, the installer might try to write a file, fail, and then report it as "missing" when it tries to read it back.