Why does the computer ignore the bootable USB flash drive?

Question

USB

Hello, I encountered such a problem: the OC installer does not start from a bootable USB flash drive.
The other day I installed Ubuntu instead of Windows (from a bootable flash drive), after a short use I realized that the idea was not the best and decided to return to Windows 10. I downloaded the image, wrote it to a USB flash drive (via the default Ubuntu utility), did the same operations as when installing Linux (I only wrote it to UltraISO), but instead of the installer, the system starts up, and if you turn off the hard drive with the axis, nothing happens at all.
I broke my whole head, took another flash drive, downloaded the image of Windows 7 already, wrote it to a USB flash drive (already through the ROSE utility), but the effect is the same, I don’t know what to do with it.
In the BIOS, I set the priority for the flash drive, and set the USB-HDD to first, I have a BIOS AWARD and Secure boot, which everyone says is not in it.
Maybe there is someone here who has encountered a similar problem or just knows how to fix it?

Answer 1

Well, since they chose me as an expert (although I'm not an expert at all in this matter) - I'll have to answer ...
It seems to me that there are two reasons to check here - is the flash drive correct, and are the BIOS settings correct.
The flash drive is checked in an elementary way: another serviceable computer is taken, and an attempt is made to boot on it from this flash drive. If it didn’t work out, the same thing is checked using another, known to be good - say, any popular LiveUSB repair and recovery assembly (from Sergey Strelts, Reanimator, AdminPE, etc., etc.). If a flash drive with the Windows distribution kit is found to be dead, you will have to make it again, either with the help of another tool (the light did not converge on UltraISO), or by changing some initial options.
By the way, the presence of such a repair and recovery flash drive allows you to bypass another defect in the distribution flash drive - an incorrect or missing bootloader. You need to start with the repair one, then plug in the distribution one, open it in WinPE, find the installer start file on it (usually it is called setup.exe or install.exe) and double-click it.
Now about the BIOS settings. You need to make sure that the distribution flash is visible in the boot list. In many computers, this list is not one. First you need to view the list of all disk devices, and set the flash to the top place there, and then go to the boot list, and set the boot from the disk to the initial position (which in this case will be this flash drive). In rare cases, in order for this to work, you have to update the BIOS by downloading its latest version from the manufacturer's website. There are also infrequent cases when it is not possible to start the installation flash drive from the blue USB 3.0 port (BIOS does not understand 3.0) - in this case, it must be plugged into a regular USB 2.0 port. And a completely exotic reason - heavily worn USB ports that do not provide good contact with the flash drive.

Answer 2

install WINE and burn with rufus or the standard utility from the small-soft site. or borrow a recording PC from a neighbor. 99% of the flash drive is written crookedly. and yes, if you have UEFFI - the flash drive must be in fat32 format

Answer 3

MBR bootloader, only UEFI on the computer - and will never see it.