Error 0x80000003 occurs when you try to launch Halo 5: Forge

You get the following error code when you try to launch Halo 5: Forge:

0x80000003

This means that your CPU's core count is below the minimum specifications to run Halo 5: Forge. You may experience poor performance or stability when running this game.

Make sure that your CPU contains at least 4 physical cores.

To ensure that your CPU is above the minimum specifications for Halo 5: Forge, follow these steps:

1. Press Ctrl+ Shift+ Esc and open the Task Manager.
2. Select the Performance tab.
3. Identify your physical core count listed next to Cores.

Compare this with Minimum Specifications to run Halo 5: Forge, and make sure you match or are above this requirement.