Windows 8 build 8520

Build of Windows 8
OS family
Architecturex86, ARM32
Timebomb2013-01-15 (+177 days)
Works in

Windows 8 build 8520 is a build of Windows 8, which at the time was released to Microsoft partners through the Ecosystem Engineering Access Program (EEAP). It was first uploaded to BetaArchive on 3 February 2020 in the x86 and ARM32 architectures in the Czech and Traditional Chinese (Hong Kong SAR variant) languages respectively; the British English and Arabic language versions of this build in the ARM32 architecture were later uploaded on 4 May 2022.

Changes[edit | edit source]

  • Reverted the set of wallpapers to the ones included in earlier builds.
  • The Start screen backgrounds seen in the RTM release have been introduced.

Editions and keys[edit | edit source]

Edition / SKU Name Key
ProfessionalWMC (edition upgrade only) MBFBV-W3DP2-2MVKN-PJCQD-KKTF7

Bugs and quirks[edit | edit source]

Watermark[edit | edit source]

  • In the Czech version, the Microsoft Confidential watermark appears to be pseudo-localized and in English.
  • In the Arabic and Traditional Chinese version, the Microsoft Confidential watermark is in English.

Timebomb[edit | edit source]

This build contains a broken timebomb and as a result can be installed on the current date.

Gallery[edit | edit source]

x86 version (Czech)[edit | edit source]

ARM32 version (Traditional Chinese - Hong Kong)[edit | edit source]

Out-of-box experience[edit | edit source]

Interface[edit | edit source]

ARM32 version (Arabic)[edit | edit source]

Interface[edit | edit source]