Shift + F10 doesn’t work during SCCM OSD

During OSD development one of the most useful things you can do is to enable command prompt support to allow you to open up a command prompt and perform troubleshooting. This is simply a matter of turning it on in the Boot Image as per

If you are used to MDT you may be puzzled to find that the equivalent in the Windows stage (Shift + F10) is missing when you deploy via SCCM. This is because SCCM sets a flag to prevent this from being accessable.

To regain this prompt, after the applying OS stage and you have rebooted into Windows delete the flag file which is located at:


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