startup sequence

The startup sequence tag covers discussions about boot order configuration and troubleshooting on Windows PCs. Common issues include the system attempting to boot from a drive that no longer contains a valid operating system, such as after removing a secondary SSD or changing between 32-bit and 64-bit Windows installations. Users often encounter errors like 'Operating System Not Found' when the BIOS boot order is incorrect or when boot configuration data becomes corrupted. Solutions typically involve accessing the BIOS or UEFI firmware settings to adjust the boot priority, ensuring the primary drive with the intended Windows installation is listed first. These topics are relevant for Windows 7 and newer versions, focusing on resolving boot failures through startup sequence management.