Your operating system isn't starting because of the hard drive issue.
Your operating system isn't starting because of the hard drive issue.
You upgraded your storage without any problems, but now you're facing a boot issue. The fact that your OS runs on an SSD suggests the upgrade might have affected the boot process or system files. Try checking the drive health, ensuring no corrupted partitions, and verifying the installation media. If the problem persists, consider using a live USB to test the hardware before proceeding.
As anticipated... you'll notice the 200MB partition at the top of the 2TB drive—it's the bootloader. I'm uncertain about transferring it to an SSD. @GoodBytes, you likely have the right idea...
AshRiver recommends creating a new boot partition on your drive following the instructions provided in the installation guide at the specified link.
In the future, ensure your SSD is connected first to the main controller and SATA port. This is where Windows places its boot partition. If you have a PCIe M.2 SSD, some motherboards fail to label it as the primary drive, opting instead for SATA (likely due to outdated board designs or cost constraints). The workaround is to disconnect the SATA drive during Windows installation and reconnect it once the OS is ready (while the system is powered off).