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Microsoft Windows 10 (32-bit)

Hello, I have notebook hp Compaq 6720s. I bought Windows 10. At the moment version 1607. Every time when start update to new version, at the end undoing changes and windows can't update version. What can I do? I have flash drive with Windows 10, 64 bit. Windows 10, 64-bit is too big for CD. I can't boot from USB flash. I try different variants in boot menu, I've changed boot order several times, but I can't make laptop boot from usb flash. Can you help me, please!

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