Windows 10 Boot Error 0xc0000225 After Installing Qubes OS on Second SSD

User Support Hardware Issues
1

Hi everyone,

I recently installed Qubes OS on a second SSD in my system, which also has Windows 10 installed on the first SSD. Since installing Qubes OS, I’m encountering a boot error when trying to start Windows 10. The error code is 0xc0000225, indicating that a required device isn’t connected or can’t be accessed.

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2

Did you change your Windows SSD partition table (e.g. resized Windows partition)?
Try to remove your second SSD and boot Windows 10 with only first SSD connected.