Bromeh,
I am facing the same problem in my lenovo B570. As you suggested, I tried changing the boot priority in my bios menu. In the boot priority order menu, I came up with the following list-
Boot Priority Order
■ USB FDD
■ ATA SSD
■ ATA HDD: WDC WD3200BPUT -24JJ510
■ ATAPI CD: TSSTcorp...