I have the same problem. I can't import any images.
Error message pops up a few secondas after entering the import screen, even if I do nothing.
Using Windows 8.1 64 bit, i7 CPU, sufficient RAM ATI Radeon 79xx grahics card.
I have the same problem. Same hardware/software except Intel graphics 8GB DDR3
Actually I have found out that it's not related to importing, but to face recognition being turned on (which I had just done shortly before I started the import).
See here for more details: Re: Lightroom 6.0.1 standalone always crashes less than a minute after start