When I select ENABLE for the Secure Boot, a message pops up saying: "Platform in Setup Mode! Both FDD and DVD boot fails to show in UEFI mode but works in Legacy. Removing CMOS battery doesn't help either: Acer Aspire stuck in legacy mode. I get everything disabled (Secure boot) but it will NOT allow me to choose the Boot List Option to change it from UEFI to Legacy. Since the new BIOS doesn't support legacy ROM's the PXE boot option won't work. I have been trying to enable the legacy boot options on an Inspiron 20 model 3043. When I enabled "Windows 8/10 WHQL support", that automatically set the boot mode to UEFI only. Secure Boot can be enabled when Platform is in User Mode. But, if you have an older PC to start with, there are a lot of reasons for you to seek for the Legacy boot … Doesn’t post anymore. Please help. The Windows files are identical, no matter what mode you used when you installed it, and you can also have both EFI & Legacy Windows Boot Mgr.s in place for the same copy or copies of Windows. Repeat operation after enrolling Platform Key (PK)" As we all know now, Windows 10 PCs come with default UEFI settings these days. It just jumps right passed it as if it doesn't exist. Just got a NUC10i7FNH after weeks of waiting. Legacy+UEFI boot mode. Now I tried to enable Secure Boot in the BIOS. But the actual problem is, when I come to the first/welcome page of Windows boot option, I just cant select any of the options. Legacy Mode in Windows 10. I want to boot to disc. Documentation for the K2K says their DHCP should see that these computers need UEFI and boot to that environment but everything I have found online about this says you have to create a USB thumb drive to boot to UEFI and connect to the K2K before the computers can be imaged. Tried updating to the current (0037) BIOS. i have already booted laptop with legacy mode now can i boot in uefi mode Anyway I have tried anything to solve the problem. I conclude that the problem is that I boot at legacy mode and I want to keep this way. Therefore, most new motherboards also allow users to switch to Legacy+UEFI compatibility mode. The problem is really annoying. 1st off, Windows doesn't care what mode you use to boot, UEFI/EFI or Legacy/CSM, so you don't/won't have to reinstall any copies of Windows. That menu option in the BIOS is greyed out. You see that I have a couple of operating systems on other disks and I want to be able to freely choose any disk that I want to boot the machine through the motherboard menu. Legacy boot mode does not normally support partitions greater than 2TB in size, and can cause data loss or other problems if you try to use it normally. External keyboard is not working after resume from hibernate. When the BIOS detects a system installed under Legacy, it will start the Legacy boot mode. It sounds absurd but niether my keyboard OR my mouse works (they are both fine, I … After setting UEFI to legacy boot mode, laptop did not boot at all, no POST either. The options are greyed out and can't be enabled/disabled. Activating the Legacy boot mode On PCs and laptops from most manufacturers, including Dell, HP, Asus, Acer, Toshiba, Lenovo and many others, the old boot can be turned on or enabled via the EFI configuration function available immediately after the PC is powered on. So, it is quite obvious that Legacy or BIOS-compatible modes are not our first choice. Trying to get up to speed with it, and right out of the gate I noticed I'm not able to enable Legacy Boot at all. Legacy mode is old but not completely useless, as some hardware (like GTX660) and systems (like XP) only support Legacy mode. ( they are both fine, I … Legacy+UEFI boot mode to UEFI only,... 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