I uninstalled it but unsure what it was, the internet says ABSOLUTELY NOTHING about it, says nothing about what it does, and it's driving me crazy. What is it? Sorry for my language but I'm fed up with not knowing.
The QCA CardReader Driver Installer is an application that provides the drivers for Qualcomm card readers. Most of the card readers don't need a specific driver since they're Plug-n-Play but it seems there are drivers. If you don't own a Qualcomm card reader, you can safely uninstall the application.
