This document applies to HP computers with Windows 8 or Windows 7.
Windows fails to start, and an error message appears: The boot selection failed because a required device is inaccessible.
When your computer starts, the system BIOS begins to check a pre-determined list of drives and devices that might contain an operating system (Windows 8 or Windows 7). Normally, the computer boots from your primary hard drive, or a boot device that you have selected, where the operating system is stored. If the boot device is damaged, or if the computer attempts to boot from a different device, the operating system does not start up and you receive an error message.
There are numerous possible causes and solutions for this error. Use this document as a guide through the troubleshooting process.