I seem to find the option in the BIOS Menu , I go to the boot tab , then all I see are these options , as you can see that the SanDisk which is my USB is listed first, how come it's not booting up?

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My Computer
- Computer type
- Laptop
- Computer Manufacturer/Model Number
- Acer Aspire M5100
- OS
- Windows 8.1 64 bit
- CPU
- Windows 8.1 64-bit
- Motherboard
- Toshiba L745D
- Memory
- 4096 MB RAM
- Graphics Card(s)
- Microsoft Basic Display Adapter
- Sound Card
- High Definition Audio Device
- Monitor(s) Displays
- 1366x768
- Screen Resolution
- 1366x768
- Keyboard
- Logitech Keyboard K800
- Antivirus
- MalwareBytes
- Browser
- Google Chrome