Been getting random NMI_HARDWARE_FAILURE BSOD's since 8.1. For some reason they initially occurred about every couple hours, drove me to the point of almost going back to W7. However, lately, they have only been every week or two...still way too many times, for sure.
What I hate about 8.1 is that they eliminated many of the shortcuts that I used to use (right click on an SSID to get to status, etc.) that I used to use all the time and have made it more difficult. I am not 100% sure that the 8.1 is a fundamental update to 8, they simply added/removed different little things, from I can tell, that give it a slightly different appearance and a few things actually work differently than in W8 (running Pro of both, btw)
I am also a little confused why several of my drivers no longer work from 8 to 8.1 and I can't find updated ones for 8.1 on several devices. Also, for some reason 8.1 broke my ability to connect to certain SSID's that were working just fine in 8 and a driver update did not fix the issue.
I guess that I am either missing something OR 8.1 is not the panacea of updates that it was made out to be.