Windows 7 / 8.1 / 10 ISO Official Direct Download Links from Microsoft

Microsoft allows consumers to download Windows 7 ISO, Windows 8.1 ISO and Windows 10 ISO from its server. The official way that Microsoft advertised is by downloading the respective version of Media Creation Tool (MCT), and let the tool download and create the actual Windows ISO files.
Media Creation Tool itself does not contain any Windows installation files, not to mention the ISO. What it does is to determine the need of the user, and then download the setup files or ISO image accordingly. Everything is done in the background, and you don’t have control on the download process. You also cannot use third party download manager to download the ISO to have better control, such as ability to pause and resume downloads.
Microsoft has a lesser known web page for Windows 10 Tech Bench Upgrade Program which provides documentations, scripts, tools and various Windows 10 ISO images for retailers and service providers to provide support for those upgrading to Windows 10, data migration services to help people move files from old PCs to new PCs, and experience stations where people can try out Windows 10.
As the web page is public, everybody can use the Windows 10 Tech Bench Upgrade Program web page to generate download links to generate Windows 10 ISOs directly, without MCT. Officially, the following editions of ISO files are available for download:

• Windows 10
• Windows 10 KN
• Windows 10 N
• Windows 10 Single Language

Both Windows 10 Home and Windows Pro editions are available in all Windows 10 ISOs, which will be determined during installation or activation time based on product key.

What’s hidden on the source code of Windows 10 Tech Bench Upgrade Program web page is the ability to generate download links of various editions of Windows 7 and Windows 8.1 ISO images. WZor, the famous Russian hacker and leaker, has published a hack script which reveals all available ISO files for download.
To download Windows 10 ISO (or Windows 8.1 ISO and Windows 7 ISO through the hack script), follow these steps:

1. Visit the Windows 10 Tech Bench Upgrade Program web page.
2. In Chrome, hit Ctrl + Shift + J to open the Console. In Firefox, hit Ctrl + Shift + K to open the Web Console (may need to type Allow Pasting before proceeding).
   In IE or Edge, hit F2 to open Developer Tools and go to Console.
    
3. Copy and paste the following JavaScript into the JS console, and execute it:

   var _0x5c09=["product-edition","getElementById","innerHTML","<option value='' selected='selected'>Select edition</option><option value='2'>Windows 7 Home Basic SP1 </option><option value='4'>Windows 7 Professional SP1 </option><option value='6'>Windows 7 Home Premium SP1 </option><option value='8'>Windows 7 Ultimate SP1 </option><option value='10'>Windows 7 Home Premium N SP1 </option><option value='12'>Windows 7 Professional N SP1 </option><option value='14'>Windows 7 Ultimate N SP1 </option><option value='16'>Windows 7 Professional K SP1 </option><option value='18'>Windows 7 Professional KN SP1 </option><option value='20'>Windows 7 Home Premium K SP1 </option><option value='22'>Windows 7 Home Premium KN SP1 </option><option value='24'>Windows 7 Ultimate KN SP1 </option><option value='26'>Windows 7 Ultimate K SP1 </option><option value='28'>Windows 7 Starter SP1 </option><option value='48'>Windows 8.1 Single Language </option><option value='52'>Windows 8.1 </option><option value='55'>Windows 8.1 N </option><option value='61'>Windows 8.1 K </option><option value='62'>Windows 8.1 KN </option><option value='68'>Windows 8.1 Professional LE </option><option value='69'>Windows 8.1 Professional LE K </option><option value='70'>Windows 8.1 Professional LE KN </option><option value='71'>Windows 8.1 Professional LE N </option><option value='75'>Windows 10 Education (Academic) th1</option><option value='76'>Windows 10 Education KN (Academic) th1</option><option value='77'>Windows 10 Education N (Academic) th1</option><option value='78'>Windows 10 China Get Genuine Chinese Simplified th1</option><option value='79'>Windows 10 th1</option><option value='80'>Windows 10 KN th1</option><option value='81'>Windows 10 N th1</option><option value='82'>Windows 10 Single Language th1</option><option value='83'>Windows 7 Home Basic SP1 COEM </option><option value='85'>Windows 7 Home Basic SP1 COEM GGK </option><option value='86'>Windows 7 Home Premium N SP1 COEM </option><option value='87'>Windows 7 Home Premium SP1 COEM </option><option value='88'>Windows 7 Home Premium SP1 COEM GGK </option><option value='89'>Windows 7 Home Premium K SP1 COEM </option><option value='90'>Windows 7 Professional N SP1 COEM </option><option value='91'>Windows 7 Professional SP1 COEM </option><option value='92'>Windows 7 Starter SP1 COEM </option><option value='93'>Windows 7 Ultimate K SP1 COEM </option><option value='94'>Windows 7 Ultimate KN SP1 COEM </option><option value='95'>Windows 7 Ultimate N SP1 COEM </option><option value='96'>Windows 7 Ultimate SP1 COEM </option><option value='97'>Windows 7 Home Premium KN SP1 COEM </option><option value='98'>Windows 7 Professional KN SP1 COEM </option><option value='99'>Windows 10 (1511 th2) </option><option value='100'>Windows 10 Education (1511 th2) </option><option value='101'>Windows 10 Education KN (1511 th2) </option><option value='102'>Windows 10 Education N (1511 th2) </option><option value='103'>Windows 10 China Get Genuine Chinese Simplified (1511 th2)</option><option value='104'>Windows 10 KN (1511 th2) </option><option value='105'>Windows 10 N (1511 th2) </option><option value='106'>Windows 10 Single Language (1511 th2) </option>","backgroundColor","style","blue","color","yellow","fontFamily","consolas","submit-product-edition","Confirm (WZT)","go to http://wzor.net/ or https://twitter.com/WZorNET or https://twitter.com/nummerok :D","log"],_0x1d62=[_0x5c09[0],_0x5c09[1],_0x5c09[2],_0x5c09[3],_0x5c09[4],_0x5c09[5],_0x5c09[6],_0x5c09[7],_0x5c09[8],_0x5c09[9],_0x5c09[10],_0x5c09[11],_0x5c09[12]],edititonbox=document[_0x1d62[1]](_0x1d62[0]);edititonbox[_0x1d62[2]]=_0x1d62[3],edititonbox[_0x1d62[5]][_0x1d62[4]]=_0x1d62[6],edititonbox[_0x1d62[5]][_0x1d62[7]]=_0x1d62[8],edititonbox[_0x1d62[5]][_0x1d62[9]]=_0x1d62[10],document[_0x1d62[1]](_0x1d62[11])[_0x1d62[2]]=_0x1d62[12],console[_0x5c09[14]](_0x5c09[13]);

   
   The JavaScript is also posted on PasteBin.
   
4. You can now select all Windows 7, Windows 8.1 and Windows 10 ISO images that are officially available for download from Microsoft.
   The available downloads include:
   
   • Windows 7 Home Basic SP1
   • Windows 7 Professional SP1
   • Windows 7 Home Premium SP1
   • Windows 7 Ultimate SP1
   • Windows 7 Home Premium N SP1
   • Windows 7 Professional N SP1
   • Windows 7 Ultimate N SP1
   • Windows 7 Professional K SP1
   • Windows 7 Professional KN SP1
   • Windows 7 Home Premium K SP1
   • Windows 7 Home Premium KN SP1
   • Windows 7 Ultimate KN SP1
   • Windows 7 Ultimate K SP1
   • Windows 7 Starter SP1
   • Windows 8.1 Single Language
   • Windows 8.1
   • Windows 8.1 N
   • Windows 8.1 K
   • Windows 8.1 KN
   • Windows 8.1 Professional LE (With Update 1)
   • Windows 8.1 Professional LE (With Update 1) K
   • Windows 8.1 Professional LE (With Update 1) KN
   • Windows 8.1 Professional LE (With Update 1) N
   • Windows 10 Education (Academic) TH1 (RTM Build 10240)
   • Windows 10 Education KN (Academic) TH1 (RTM Build 10240)
   • Windows 10 Education N (Academic) TH1 (RTM Build 10240)
   • Windows 10 China Get Genuine Chinese Simplified TH1 (RTM Build 10240)
   • Windows 10 TH1 (RTM Build 10240)
   • Windows 10 KN TH1 (RTM Build 10240)
   • Windows 10 N TH1 (RTM Build 10240)
   • Windows 10 Single Language TH1 (RTM Build 10240)
   • Windows 7 Home Basic SP1 COEM
   • Windows 7 Home Basic SP1 COEM GGK
   • Windows 7 Home Premium N SP1 COEM
   • Windows 7 Home Premium SP1 COEM
   • Windows 7 Home Premium SP1 COEM GGK
   • Windows 7 Home Premium K SP1 COEM
   • Windows 7 Professional N SP1 COEM
   • Windows 7 Professional SP1 COEM
   • Windows 7 Starter SP1 COEM
   • Windows 7 Ultimate K SP1 COEM
   • Windows 7 Ultimate KN SP1 COEM
   • Windows 7 Ultimate N SP1 COEM
   • Windows 7 Ultimate SP1 COEM
   • Windows 7 Home Premium KN SP1 COEM
   • Windows 7 Professional KN SP1 COEM
   • Windows 10 Version 1511 (TH2 November Update Build 10586)
   • Windows 10 Education Version 1511 (TH2 November Update Build 10586)
   • Windows 10 Education KN Version 1511 (TH2 November Update Build 10586)
   • Windows 10 Education N Version 1511 (TH2 November Update Build 10586)
   • Windows 10 China Get Genuine Chinese Simplified Version 1511 (TH2 November Update Build 10586)
   • Windows 10 KN Version 1511 (TH2 November Update Build 10586))
   • Windows 10 N Version 1511 (TH2 November Update Build 10586)
   • Windows 10 Single Language Version 1511 (TH2 November Update Build 10586)
5. Select the edition that you want to download and hit Confirm.
6. Select the product language that you want to download and hit Confirm.
   
   English is for en-US edition and English International is for en-GB edition.

    
7. Click on the link of 32-bit Download or 64-bit Download to start downloading the ISO. Links valid for 24 hours from time of creation.