I'm using dell XPS 8500 Win 8.1. All of a sudden my built in SD Card (15 in 1) reader stopped working. When I insert a card the little light comes on and I see the drive in Windows Explore. But when I click on the drive it asks me to insert a drive. It does not read files on the card. The card I used works on other PC's. I uninstalled the driver and restarted the PC. It reinstalled the driver but still no good. The driver is old ( 2006) but I can't find a newer one one. Device Mgr calls the drive generic SD/MMC. The Compact card reader works fine.
I’d suggest that you update BIOS and chipset driver on your computer to check for issue resolution. Please enter your service tag # on the link below, then download the BIOS from BIOS section and chipset from chipset section onto the system and install it.