I have installed two new monitors (22" and 24") replacing two of my 17" monitors. I have on 17" monitor left. Thus, three monitors today (as before).
The start-up used to be on my now only 17" monitor. Now, however, "BIOS start-up" is on the 24" monitor, as well as the beginning of the Windows 7 Ultima (64-bit) start-up. Then, the remaining Windows start-up is on the 17" monitor. Weird, and I have no idea why. What could be going on?
I find no "primary monitor" or the like in BIOS.