Comment by exikyut

A quick poke over at https://the-eye.eu/public/MSDN/ suggests the following (there may be more checked builds hiding in the sea of Latin filenames :P):

https://the-eye.eu/public/MSDN/Windows%207/

- en_windows_7_debug_checked_build_dvd_x64_398741.iso

- en_windows_7_debug_checked_build_dvd_x86_398742.iso

https://the-eye.eu/public/MSDN/Windows%20XP/

- en_windows_xp_professional_x64_chk.iso