How to install dual system win10?

win10 installation dual system tutorial to slightly ~ small series will demonstrate win10/win8.1 dual system installation steps, some friends want to experience the latest Windows10 system reluctant Windows8.1, then you can install dual system oh ~
< Br> 1, go to the official website to download win10ISO file, copy the key to save.
2, prepare a new partition of win10 recommended around 100G.
3, extract to the root directory of any partition except win10 partition.
4, download nt6 the same as the same decompression in the same partition, click install to restart.
5, select nt6 with 2 startup items, waiting for access to the interface will prompt the digital signature invalid (this to enter the motherboard settings to find the bios option to close, my English is not good, each motherboard is not the same, Anyway, I chose xxxbios to close it.
6. Enter the installation interface to select the language of the advanced/custom installation, choose the new win10 partition installation.
7, all installed into the computer interface after my computer Right-click property activation, enter the copied key or call.