First, to enter the BIOS!

Desktops, usually in the boot when the Delete key on the keyboard, can enter the BIOS interface;

Second, set the startup sequence.

Set the startup sequence, the key is to find the inside of the BIOS Boot, Boot is to start), find the Settings after the First startup sequence -- -- -- -- -- the First Boot Device Boot Device (= 1 st)!

1, need from the Boot, the First Boot Device is set to the cd-rom (if your DVD CD/DVD ROM);

2, need from USB removable media such as start, the First Boot Device Settings for USB FDD or USB - ZIP, USB CDROM, (if you don't know your mobile media is the type of above, I suggest you take the First start the second and third respectively set up for the above three types, wouldn't be wrong!) . Lenovo some machine is special, its mobile identification unified removeable device, set to start when just set this to the first;

3, need to start from the Hard Disk (generally after we installed the system, the First startup sequence is modified to the Hard Disk), the First Boot Device is set to the Hard Disk (or FDD - 0);