Selecting boot option with 2 internal hard disks

[8796789782]

Hello,
How should i get an option when i put two hard disks in my pc & when both have windows installed in them?

 

[mcnumpty23]

by pressing one of the f keys as the pc boots

which one depends on your motherboard

some use f12 others use a different key

or if they are both on the mbr you will get the choice of two operating systems at startup