Windows10 official version of the upgrade file /$ Windows. ~ BT where?

The official version of win10 has been released recently, but many people don't know how to install win10, so the forums are discussing how to install win10. In the process of installation, you need to find the $Windows.~BT file. Here is the file. How to find it

1, first open this computer/my computer

2, then click on the menu bar ‘View & rsquo; button
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3, then to ‘Show/Hide & rsquo; box, check ‘Hidden items & rsquo; checkbox

4, then you can see $Windows. ~BT file

5, then everyone can use their own method to install win10

6, finally talk about my installation method, is to put $Windows .~BT file is copied to the non-system disk, then open the ‘sources’ file in the file, and finally double-click to open the ‘setupprep’program in the sources file