en-gb_windows_8.1_with_update_x64_dvd_4048142.iso SHA1: 1F18420D65956DFE56E2359DA71AB6C363146570 and en-gb_windows_8.1_with_update_x64_dvd_6051481.iso SHA1: C99A6EC2DE4A71DEF522989D2242CB34AB860A0D The latter is the one found on MSDN. Not sure where the first came from, found it on my external HDD.
first was on MSDN as well, but when they refreshed/updated the iso's on MSDN they remove the 40xxx and replaced with the 60xxxx