EfficientNinja
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- Mar 26, 2018
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If your computer cannot boot from a USB drive and CD while trying to install Windows or another operating system, here is a guide to fix it.
Cause: Because Secure Boot is on and Boot Legacy (Launch CMS) is off, your computer can not boot from a USB drive or CD.
How to fix a laptop without USB Boot:
Step 1: You need to boot your computer and enter BIOS mode.
Step 2: Use the up and down arrow keys to select the Secure Boot Menu.
Step 3: Use the up and down arrows to select Secure Boot Control and select Disabled to disable Secure Boot.
Step 4: Press F10 on the keyboard and select YES to save the setting.
Step 5: Press the ESC key on the keyboard to return to the original screen.
Step 6: Use the arrow keys on the keyboard to navigate to the Launch CMS tab. Select Enabled and press Enter to enable the Boot Legacy (Launch CMS) mode.
Step 7: You continue to press the F10 key on the keyboard and select YES to save the setting.
After turning off the Secure Boot and launching the Boot Legacy (Launch CMS), you have fixed the issue of your Laptop not detecting a USB flash drive during bootup.
Hope this helps.
Cause: Because Secure Boot is on and Boot Legacy (Launch CMS) is off, your computer can not boot from a USB drive or CD.
How to fix a laptop without USB Boot:
Step 1: You need to boot your computer and enter BIOS mode.
Step 2: Use the up and down arrow keys to select the Secure Boot Menu.
Step 3: Use the up and down arrows to select Secure Boot Control and select Disabled to disable Secure Boot.
Step 4: Press F10 on the keyboard and select YES to save the setting.
Step 5: Press the ESC key on the keyboard to return to the original screen.
Step 6: Use the arrow keys on the keyboard to navigate to the Launch CMS tab. Select Enabled and press Enter to enable the Boot Legacy (Launch CMS) mode.
Step 7: You continue to press the F10 key on the keyboard and select YES to save the setting.
After turning off the Secure Boot and launching the Boot Legacy (Launch CMS), you have fixed the issue of your Laptop not detecting a USB flash drive during bootup.
Hope this helps.