At present, only the latest system version can be obtained in Microsoft official website. If you want to download the original win7, you can download it in MSDN. The specific steps are as follows:

1, open Baidu, enter "MSDN" in Baidu and click search;

2. Click the first entry in the search results, and then select "Operating System" on the left;

3. After entering the operating system, drag it down and find it inside: windows7 system click;

4. After clicking Expand, you can see windows 7 on the right, and select the language version: Chinese Simplified. After choosing a good language, drop down the mouse to find it: windows 7 Ultimate(win7 Ultimate Edition), click on the details;

5. After clicking on the details, you can see the downloaded magnetic link inside. Copy this link to the download tool to download this system.