Just yesterday, 3 hours wasted
A friend's high end HP i7 laptop was taking 3 minutes to boot on a not so bad hybrid HD. Moved him to SSD just to see the freaking thing still takes 2 minutes to boot with a 549 MB/s read rate. Updated the graphics driver using windows update, it boots in 10 sec. Next time, black screen of death. Switched to archaic HP Win 8 driver, it boots fine and couple of minutes later, screen flickers and we have the latest, non working driver again thanks to windows update.
The issue is,MS dares to touch a highly customised, special setup hybrid graphics mix of Intel HD3000+ATI. Both chip vendors (ATI and Intel) say don't mess with drivers in your case, go to laptop manufacturer (HP) and yet MS overwrites the drivers.
They removed the "don't auto update drivers" option too so you have to run a special, official tool by MS to block installs of specific hardware drivers. I can't imagine any newbie, non technical user understand that concept. They will think that their system is broken. MS could at least code an auto rollback driver function, it is all about caring.
He could buy 3 high quality tablets for that price and damn things keep working like a charm even without updates, there are even android 3 tablets in use which never had updates.