New
#11
I don't disagree with earlier advice but still believe pulling cables was the way for me:
1) Image OS to an external HDD. I used Windows imaging but Macrium Reflect is fine. Acronis if you want.
2) Unplug existing OS HDD & plug in new.
3) Reimage and confirm it boots ok. Then unplug.
4) Return existing OS HDD.
My logic is why have a backup HDD spinning and wearing out for no good reason. If your main OS HDD dies it takes 5 min to plug in the backup and a little longer if you want to reimage to your most current image.