Question Win 10 does not boot after Clone, BIOS takes ages to show up

Mar 7, 2020
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So I cloned Windows from a 120Gb SSD onto a 480Gb SSD. I accidentally converted the 480 to a dynamic disk. Now I can't boot from either one and my BIOS take ages to show up. (POST-Screen gets shown for like 20-30 seconds) I have a WIN10 install disk, I can boot to it if I have my 120Gb SSD in the System, when I have the other one intalled, it just shows a Bluescreen:
INACCESSIBLE BOOT DRIVE.
Do you think a clear CMOS may help, because the BIOS take so long?
 
Welcome to the forums, newcomer!

You're advised to install your OS afresh on a new drive/SSD as opposed to cloning the drive. No a Clear CMOS will not change your issue. You should use a utility like EASUS partition Master(or their ilk) to revert the disk to a basic drive(not dynamic).
 
But why can't I boot from my old drive? I haven't really changed anything there. I have now completely deleted everything off the 480 drive (did it with a bios tool). I still have a (very slow) third drive, I can test if I can boot from that one