Not sure how long it will last but I have had success (now 6hrs on time - no problems) by right-clicking on the taskbar, going to properties and unticking 'use small taskbar buttons' (I had it...

I'm also having this problem. It started happening as soon as I booted up after updating. I have found the time at which it "hangs/stops responding" varies - sometimes I get 45 minutes of use,...