BIOS and Windows

[Curious Adrian]

I have installed windows on two different partitions of my drive. The first one is the main Operating System that I keep using while the second one was only a result of testing if my bootable USB Device was still working.

So after knowing my bootable device was working, I reformatted the partition used for the test. How do I stop the BIOS from prompting me two Operating Systems every system restart?

 

[SkyNetRising]

That's not BIOS prompting. Bootloader does that.
You can use bcdedit to edit boot menu (command line tool and not a very convenient one).
Or you can try some 3rd party BCD editing software - Easy BCD, Vista Boot Pro or some other.

Also you can set delay of menu prompt to 0, and you will not see it again.
https://superuser.com/questions/497...the-boot-menu-from-30-seconds-to-5-seconds-on