Hi tsw,
You can try updating the BIOS of the computer.
I recommend testing a previous version of Intel RST in case the issue persists. This is the link to the driver https://downloadcenter.intel.com/Detail_Desc.aspx?agr=Y&DwnldID=22194&ProdId=2101&lang=eng&OSVersion=Windows%208*&DownloadType=Drivers