Since it's unknown what either of these changed perhaps the quickest method is to spin in your last w7 backup.
If you don't have such a thing (why not?) then perhaps a factory restore.
Also look at the restore points windows has made see if any of those will get you back to a functioning machine.
After upgrading to Windows 10, my computer started crashing while playing computer games.
Event log viewer showed: igfxcuiservice188.8.131.52
I also got an EM upon bootup to do with the video cards.
To save troubleshooting, I simply chose to revert to Windows 7 using the feature they included in the win 10 upgrade.
Since then, I can no longer boot at all (outside of safe mode). I get bluescreen EM:
*** STOP: 0x0000007E (0xFFFFFFFF80000003, FFFFF88003B4402D, 0xFFFFF880009a9328, 0xFFFFF880009A8B80)
Speck are as follows:
Intel(R) core(TM) i3-4030u CPU @ 1.90 GHz
Running Windows 7 service pack 1
NVIDIA GeForce 840 v 184.108.40.20657
(also lists "standard VGA graphics adapter)
I think this is a video card issue but I'm not so sure how to proceed.
Thanks for your advice and help!