Can't help but wonder if they've been 'tweaking' things in their registries, or installing reference Intel video drivers instead of the ones released by Microsoft. Lot's of potential system variations we'll never know about...
I've found that tweaking becomes detrimental to stability of modern OS's, Drivers tend to be modified for devices by OEMs especially on Ultrabook and Tablets.
At least for me (and I dare say most with this problem), I've dealt with 5 SP2's now, all bone stock, with minimal software added, and nothing driver or "tweak" related, and get these crazy annoying updates every week or two... it's always an anonymous "System Hardware Update" that's about 200kb.... nobody can tell me what it does or why, and it's a regular occurrence on all the machines. All Microsoft will link to is generic useless support pages when investigating.
I've tried to pursue this exact issue on the answers.microsoft.com boards, but that place is from all I can gather completely useless. The only help I get there is from other users, I swear MS doesn't even monitor the boards and just have volunteer moderators to spit out canned crap without even answering a single question. Well, now that I reread what I just typed, that sounds exactly like MS live chat support.......
mg:
MS needs serious help in the support of these devices... I love the hardware when it works, but "tweaking" isn't the problem.
EDIT: And before Benjitek replies it's CPU related, yes this happens on
both variants of the CPU exactly the same