Error code 0xc0000185 almost always appears when a Windows PC boots up, usually after a system reboot. It almost always manifests as a BSOD, or Blue Screen of Death, with text that says, “The Boot Configuration Data for your PC is missing or contains certain errors,” followed by the error code.
[Solution] How to Fix Code 0xc0000185 Windows 10 Boot – BCD Error Code 0xc0000185
It is also possible that the message reads: "Your PC needs to be repaired. The Boot Configuration Data file is missing required information." You can fix this error quickly in most cases.
This error is caused by corruption of files related to the boot function of a Windows PC. Specific files have been deleted or damaged somehow, or something as innocent as a bad shutdown or a new peripheral device throws a spanner in the works.
It can also be the result of malware or faulty hardware. This error is just a symptom of a growing problem.