Just start WinPE, extract the Win7 ISO and use Dism++ to install KB5017361 patch from Microsoft Update Catalog, and restart your computer, start installing Win7! But if your computer supports CSM, you have already installed Win7 and want to use Secure Boot, unfortunately, you should reinstall the system! Here is a blog about this exciting news: Windows7不再卡五叶草，更新了bootx64.efi和bootmgfw.efi文件，支持安全启动，不用关闭安全启动和打开csm支持._kb5017361-CSDN博客 (use Microsoft or Google translate).
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