I've been using my SP3 for a couple years without incident, but now I've started sharing it with my spouse. When one of us is logged in under our profile, and we try to switch to the other, frequently the incoming user's profile doesn't "boot" into tablet mode. This means the touchscreen isn't active, and means that the start menu tiles don't always load right. I've done a lot of searching and haven't found this issue anywhere. Anyone have any solutions, suggestions, or advice? Rebooting solves the issue, at least until the second person logs in. It's somewhat sporadic. Might be related to allowing it to passively go to sleep instead of actively selecting the sleep button, but I'm not sure.