[Phule]

There is a setting in the CMOS, before the OS is loaded, that tells the computer what drive(s) to check for the OS, and it can generally be changed. If you watch the boot up process, early on there is generally a brief line that says something like "press F10 to enter setup" or some such - I don't recall exactly. Could be delete. Anyway, pressing that button in the (very) short time the machine is responsive to that function will bring up a menu from which you should be able to tell the computer which drives to check on boot up. Hope this helps....