Whenever you want to make clean install or re-install of windows then you need Windows 10 ISO files. Actually official windows 10 ISO is more easy to make clean install.So that here we learn How to fix this problem in easy way.
I am going to provide you best way to get the official windows 10 ISO files.
Microsoft provide two type of ISO files for Windows 10 users:
1.Release to Manufacturing (RTM) BUILD 1020-November Update Build 10586(V1507)
2.Anniversary Update Build 1493 (V1607)
Step 1: Using Media Creation Tool(MCT)
1.Download MCT using following link: DOWNLOAD LINK

2.When download is completed then double click on MediaCreationTool.exe file.Then Accept the Software License Terms.

3.Select Create installation media for another PC option then click next.

4.Now check the box below where written Use the recommended options for PC then click next.

5.Then you will be asked in which media you want use.if you have USB drive then you can select USB flash drive or you can select ISO file if you have DVD.

6.Now select where do you want to save the downloaded ISO file then click save.

7.Finally it should be downloading of Latest Windows 10 ISO files.and your downloading speed depend upon your internet speed.

Step 2:Direct Download Windows 10 ISO file.
→ Click on Download