This issue is caused by the operating system recognizing a docked monitor as an external hard drive and trying to boot from it. It can be resolved in the following ways:
- You can undock your monitors during the boot sequence.
- You can modify the BIOS settings on your computer and place your internal hard drive above the USB hard drive option in the boot order setting. Note that booting from a USB drive is sometimes desirable. For example, some system recovery procedures or other bootable environments (e.g., an Ubuntu LiveCD) need to have the USB hard drive option higher than the internal hard drive in the BIOS boot order in able to start correctly. If this is the case, you can switch it back for this operation.