Question No bootable device

[stucktechguy]

On my old pc i wanted to reinstall a fresh win10, but i couldnt due to usb boot errors, took the harddrive out, placed it in my new pc, installed a fresh win10 and then placed it back in my old pc and I get the no bootable device error. Could this be caused by the reason that i ve installed win10 in ahci mode on my new pc while my old one has no ahci? also I tried changing to ide in my new pc but it only has raid mode. can anyone help me please?

 

[CountMike]

On my old pc i wanted to reinstall a fresh win10, but i couldnt due to usb boot errors, took the harddrive out, placed it in my new pc, installed a fresh win10 and then placed it back in my old pc and I get the no bootable device error. Could this be caused by the reason that i ve installed win10 in ahci mode on my new pc while my old one has no ahci? also I tried changing to ide in my new pc but it only has raid mode. can anyone help me please?

Yes, you got it right.

 

[stucktechguy]

Yes, you got it right.

As I stated, have no option on my new mobo to switch to IDE, nor can I fresh install from my old pc. How could I fix this so the harddrive will work on my old pc?