If you've ever run into the 0x0 0x0 error code on a Windows 11 device, here are a few things you can try to troubleshoot and fix the issue.

Microsoft has fixed a known issue causing "boot device inaccessible" errors during startup on some Windows Server 2025 systems using iSCSI.

This device has been reserved for use by the Windows kernel debugger for the duration of this boot session. (Code 53) What is Windows kernel debugging?

Security update KB5058405 for Windows 11 23H2 and 22H2 comes with severe side effects for some PCs. Microsoft's emergency patch fixes it.