The point is not running Windows or Outlook on a PC in space. The point is that the Software was not sealed, downloading upgrades while in space, sending telemetry back to Microsoft (or to whoever else). Those PC are like any other instrument onboard the spacecraft: it's status needs to be known and predictable by NASA. Not to talk about the amount of unknown and unpredictable extra traffic caused by those PCs onto t…
Ah yes but do you think MS gives a flap about this?
Same thing with the recent Fedramp certification. "Hey they're using it so we might as well certify"