SD card reader not working in Windows 10 1909 on 2019 iMac

FYI: Windows 10 1909 did not recognise the card in the SD card reader at all in my 2019 iMac. Tried re-installing the Broadcom driver provided with bootcamp by Apple but Windows compained of invalid hash so refused to install it. Basically Apple has provided a faulty driver file and clearly not tested it with latest Windows releases!

Downloaded the Broadcom driver from Microsoft and installed and now it works.

Go to http://www.catalog.update.microsoft.com/Search.aspx?q=windows%2010%20VEN_14E4%26DEV_16BC

You'll see 5 results - 3 of which are 32 bit drivers - the 2 sized at 218KB and 219KB are the 64 bit drivers, both valid but the 218KB driver Broadcom Corporation driver update for Broadcom SD Host Controller is slightly newer (newer signature) and was actually updated 25-09-2015 despite the 2014 date shown.

Download that (should be 200006601_b1953a20875a91afff078ed00009cfda12872462.cab) and extract it using your favorite zip utility and then update the SDA driver pointing it to the folder where you unzipped the driver which should then install the correct Broadcom driver.

Apple - please could you update the bootcamp drivers with the correct (Microsoft signed) driver?

Hope this saves somebody time searching for an answer.

Regards

Rich