First you need to make a bootable Pen Drive of windows 10, click HERE to know how to create bootable Pen Drive
Now continue
1. Connect your bootable windows 10 pen drive to your pc or laptop.
2. Restart your PC, go to bios setting by pressing “delete” go to boot, select USB Pen drive as a first boot, save and exit
3. Your PC will restart, press any key to continue installation
4. Now follow the on screen instruction
(Watch this video to know to installa windows 10)
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