I recently installed a package of Win7 security updates about a week ago. Suddenly this week I have been getting BSODs. The first occurred early in the the week after I logged on. Then today I had two occur back to back while attempting to shut down. Haven't experienced this for over a year when I was getting conflicts with the Nvidia GeForce Experience utility which I uninstalled (as I am not a gamer) and never had another BSOD episode until now.