System nuked by Intel graphics driver update. had to fully restore. System would not boot up. Automatic repair tried to undo the update and could not. Thank goodness I had just upgraded my HDD by cloning and had previous HDD from last week sitting on my desk. This is horrible.
I'm guessing the issue is due to me not using the on-board Intel video but instead using NVIDIA GeForce GT 640 - Which came with the PC from DELL. Still, this should be anticipated in the driver install.
Where did you get your drivers from? Because the laptop uses hybrid graphics (i.e. two active graphics engines), you should only use driver updates that come from or are approved by your laptop vendor. This includes both the updates from Intel as well as the updates from NVIDIA and AMD.
In the Intel graphics drivers for 6th gen and later processors, support was added recently for installing driver updates from Intel without wiping out the customizations that the vendors have added for the control of the hybrid graphics solution. I am not aware of any similar effort on the part of NVIDIA or AMD, however, so do not know if they also have this capability. Suffice it to say, if they don't, installing their latest releases could wipe out the hybrid solution and nothing then works properly.
Bottom line, you should only download updates that have been validated by your laptop vendor and approved for use on their laptops. Updates that come through Windows Update are supposedly approved by your laptop vendor, so talk to them if they are wiping out your graphics support.