Windows 8 build 8520

Windows 8 build 8520 is a build of Windows 8. This build was leaked on 3 February 2020 in both x86 and ARM versions in the Czech and Traditional Chinese (Hong Kong SAR variant) languages. It reuses the Windows 7 login screen background as the default desktop wallpaper (identical to Developer Preview).

This is the last leaked Windows 8 build to contain the Microsoft Confidential watermark, although it was reused in pre-release versions of Windows 8.1.