Notice that Bing and Yahoo searches were down earlier today? Or maybe Siri and Cortana? No, it wasn't the result of a hack -- it was something less nefarious according to Reuters' sources. Apparently Microsoft issued a bad code update and then couldn't hit CRTL+Z fast enough once it went live. This caused a bit of a domino effect, it'd seem: Because Redmond's roll-back didn't work, it had to turn off groups of linked servers to get back to the point where things were working as they did pre-crash. Since Bing powers Yahoo searches, that caused things on Yahoo's end to go on the fritz because of the backlog of search requests that populated when the problem was resolved, Reuters notes.