Last night, my Nvidia graphics driver crashed playing a game. I thought alright, I'll just restart to reload the driver. What I didn't know was that Microsoft would immediately force their Intel HD4600 graphics driver update onto my computer, without even letting me know that was going on. So I restarted, probably in the middle of that update, Windows never told me "wait till this is installed" or anything, and the driver update I didn't need or want must have only partly installed, because the restart failed, and when I finally did get the computer going, it had all sorts of issues going on. The bus clock was going to 267, the CPU clock speed to over 6,000MHz. Not good, not fast. Everything freezing. 10 fps in GTA, 10 fps in Valley, screen flickering on desktop etc. Meantime, I had no idea all this Intel driver update business had gone on, so I tried all sorts of other things. It was only when I installed DDU and it listed Intel's HD4600 driver as having been installed moments after the Nvidia driver crash, that I thought yeah let's uninstall that. And hey presto it sorted everything, even the weird bus clock/clock speed readings.
This is very unprofessional from Microsoft, not to mention a pain in the ****. Wrong to force without asking, wrong to not let you know it's going on, and to top it off, not even the right driver this time.