Windows 7 on two HDD, Crashes

iW1llX

Honorable
Oct 28, 2013
41
0
10,530
So the other day I was running out of space on my HDD so I decided to take my old HDD from my old pc and put into my new pc. Both of these HDD have windows 7 on them. I have noticed since I had done this my pc is crashing alot more when booting up. Is this because of it not knowing what HDD to boot from?

If you know what the problem is please help me because it is really annoying.

Thank You