All our servers and company laptops went down at pretty much the same time. Laptops have been bootlooping to blue screen of death. It’s all very exciting, personally, as someone not responsible for fixing it.
Apparently caused by a bad CrowdStrike update.
Edit: now being told we (who almost all generally work from home) need to come into the office Monday as they can only apply the fix in-person. We’ll see if that changes over the weekend…
You should read the saga of when MS bought Hotmail. The work they had to do to be able to run it on Windows was incredible. It actually helped MS improve their server OS, and it still wasn’t as performance when they switched over.