Hi simonsj,
I am sorry you are having problems with your system but let me help you.
I see you have done several troubleshooting steps but at this point not sure what driver version is so, I recommend you to uninstall the current driver and install the latest that can be downloaded at the following link:
https://downloadcenter.intel.com/Detail_Desc.aspx?agr=Y&ProdId=3712&DwnldID=23639
Updating the BIOS is another good step.