Wireless. Why might that make any difference? Wired, broadband is 11Mbps. Wireless, broadband is 11Mbps.
I have the crap from Windows Update (currently 4973) (because I had so much hassle with Intel Driver & Support Assistant installing arbitrary versions, eg. 4749, 4849, 4836). But I reckon that's not the problem Scott, 'cos this has gone on so long that I have been through several drivers.
So, Scott, you've sort-of answered my question thanks. Because if you have not heard of this elsewhere, then it must be a problem of my configuration.
It suspect it is graphics related. I only have 8GB RAM, which means really only 4GB if you think that Iris Pro "steals" up to 4GB. And 4k monitor. But ... I have 950PRO SSD, so Windows ought to be able to do virtual RAM plenty fast enough?