Forum Discussion
Please help me fix my Windows install ?
Hello, I've recently upgraded my NVMe SSD from an Adata 500GB to a WD 2TB. Whilst I was still using my PC with Win11 on the 500GB Adata drive (Drive A), I popped the 2TB WD drive (Drive B) into my second M.2 slot and proceeded to install Win11 on the new drive.
I then booted onto Drive B and proceeded to move everything there and when I was done I formatted Drive A. I then took Drive A out of the motherboard but to my surprise I couldn't boot onto Drive B.
I now need to have the Window-less Drive A to be installed in order to Boot onto Drive B.
Please see screenshot. I have noticed that the Drive B doesn't have an EFI System Partition and that according to my motherboard it also does not have a Windows Boot Manager.
Where did I go wrong here? And how do I fix this? Do I have to perform a clean reinstall here?
Before you start any of these procedures, if you can still access your Windows installation on Drive B or if you’ve moved data to it, ensure you back up important files to avoid data loss.
The Drive A is not listed. Make sure it is well connected to the motherboard!
Try to add the Boot Entry manually in BIOS:
Go to BIOS → Boot → Add New Boot Option and see if you can add Windows Boot Manager manually.
If it still fails, consider reinstalling Windows 11:Backup important data, unplug Drive A and leave only Drive B, and then do a fresh install of Windows 11 to make sure it boots properly.
