You can use a partitioning tool like Gparted to check your target disk and make sure its GPT. Also note that the windows installer prefers that the drive you are installing windows on be the only internal drive connected and be totally blank with all of the space unallocated and have a GPT partition identifier. Its most likely booting on other systems using their boot info. ![]() ![]() Inside this menu, you will find Boot or a Startup Sequence submenu. The USB flash drive won't appear in the Boot menu. Share Improve this answer Follow answered at 16:12 vikkp 63 5 The F12 boot option is enabled. ![]() Check if you have the authority to do this. Microsoft requires computer manufacturers to lock down the hardware settings to prevent booting from USB. Inside the BIOS, search for a Tab labeled Boot or Startup. Navigate to the 'Startup' area and ensure that the F12 boot option is enabled. The first step is to enable the boot from USB option. Press the dedicated BIOS key once you see the Lenovo logo. You are really doing it the hard way and in my opinion making a mess which is why it doesn't work. Connect the secondary boot source ( For instance, a USB drive) to your Laptop. There is no need for diskpart, formatting, creating a partition, cleaning or assigning it since all of this is included in the ISO disk image. Alternately you can use the tool to prepare an ISO disk image file and then use a utility like Rufus (Rufus.ie) to mount the ISO disk image onto the usb. Normally one uses the Windows Media Creation tool to prepare the usb. It may be booting on them using the boot info already on the system. ![]() Because it is a Home Edition we cannot put it on the domain and make it a real workstation. I would not prepare a windows installer usb this way and do not believe your usb was properly prepared to boot even though you claim it boots just fine on your other systems. Lenovo Hardware This Lenovo laptop won't let me boot from USB Posted by longvue3 on Oct 24th, 2018 at 12:08 PM Needs answer Lenovo Hardware Hello, I have a Lenovo Flex 3-1480.
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