Can't start Windows 7 setup

[Distig]

Hello,

Having Lenovo b50-80

I had Windows 7 Ultimate with GPT partition. I want to install Windows 7 Home Premium with MBR partition.

I started with formating HDD through dispart and converting it to MBR.

Then I inserted my USB stick with Windows installation ( I already used it on a Lenovo ThinkPad and it was Okay)

But it don't want to boot from USB.

I looked all other internet for a solution and tried a lot of things. Ofcourse first of all I enabled Legacy Support and Legacy First, then disabled Secure Boot, Boot order, changed USB port (now using USB 2.0 ofcourse). But nothing helped. Now, using recovery mode I go to Boot Menu and select my flash drive but it just flashes the screen like trying to start booting from USB and the just restarts after 1 second and goes again the same. When I enabled Lan boot, I can see in console that it starts booting from USB smthing like "Starting booting from USB device..." and right after it, I see logs from LAN boot, restart and again the same. So... windows installation don't start no matter what I used.

Beg you for help

[CBHedricks]

wipe the hard drive, leave in unformatted state. Download the ISO from Microsoft for Windows re-install, create a new USB and try booting from it. If successful, have Windows format and partition during install script and it should default to MBR use.

Just on a side note, why MBR - GPT has better options and is more secure...

CB