I had this with a old Toshiba laptop ( 6 Years old) I found that I could get it working for a few days by rolling back the driver BUT the pesky microsoft update would then overwrite it. It appears Microsoft has a pact with hardware companies to brick older machines by knocking out various hardware like network and Wfi devices with unworkable driver files.
I fund this out when I brought a USB network and WiFi dongle from a small shop and the guy behind the counter said he sold a lot of them after the last major update so I was not alone. Sneaky Microsoft!!!!