Fix removal of some boot entries for Ubuntu derivatives. Fix BIOS boot support for Arch derivatives. Fix ISO mode support for Red Hat 8.2+ and derivatives. If the option is not there look under Authentication section-> Set "Secure Boot" to Enabled. Go to Boot section, set "Secure Boot" to Enabled. Go to Boot section, set "Boot Mode" to UEFI. If the option is not there look under Authentication section-> Set "Secure Boot" to Disabled. Go to Boot section, set "Secure Boot" to Disabled. Go to "Advanced"-> "Settings"-> "Windows OS Configuration"->Secure Boot-> set "Secure Boot" to Enabled.Īcer PCs and notebooks Disable Secure Boot. If you want to enable Secure Boot: "Advanced"-> "Settings"-> "Windows OS Configuration"-> look for "Windows 8/8.1 Feature" or "Windows 10 WHQL Support" and set it to "UEFI". Go to "Advanced"-> "Settings"-> "Windows OS Configuration"->Secure Boot-> set "Secure Boot" to Disabled. Go to Boot and set "Secure Boot" to Enabled. Go to Boot and set "CSM Support" to Disabled. Go to Boot and set "Secure Boot" to Disabled. Gigabyte motherboards Disable Secure Boot Go to Security ->Secure Boot-> Set "Secure Boot" to Enabled. Go to Advanced-> CSM Configuration-> Set "CSM Support" to Disabled. Go to Security ->Secure Boot-> Set "Secure Boot" to Disabled. Go to Boot > Secure Boot, it should show that Secure Boot is enabled. Go to Boot > Secure Boot > Key Management-> "Restore DB Defaults". Go to Boot-> CSM(Compatibility Support Module)-> set "Launch CSM" to Disabled. Go to Boot > Secure Boot, it should show that Secure Boot is disabled. Go to Boot > Secure Boot > Key Management-> Clear Secure Boot keys-> Yes. Go to Security and set "Secure Boot" to Enabled. Go to Boot->CSM(Compatibility Support Module)-> set CSM to Disabled. Go to Security-> set "Secure Boot" to Disabled. Switch to "Advanced Mode" if the BIOS is in "Easy Mode". 
Reboot system and press Del repeatedly at system start.See "Checking MBR or GPT partition style" of this guide. Precautionary notice: If you haven't had this enabled before, your OS will not boot if your boot disk partition style is not GPT. Look for "Secure Boot" option under under Boot, Security or Authentication menu categories.Go to Troubleshoot > Advanced options > UEFI Firmware Settings and press Restart. After restart, the Advanced Startup menu options will appear. If that does not work, go in Windows, hold the "Shift" key and select Restart from the Start Menu.Some OEM PC(HP, Dell, Acer, Lenovo, Toshiba etc.) and notebooks use keys like F1, F2, F8, F10 or F12 for entering BIOS.
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