I just got a new graphics card, AMD Radeon HD 7790, and I'm having trouble installing the driver. I uninstalled my all of my old graphics drivers and used Driver Sweeper. I then downloaded the appropriate driver from the AMD site and attempted to install it, but I ran into errors when the installer tried to install the Display and HDMI Audio driver packages. According to the log, both failed because the INF file was not found.
Next, I downloaded the auto-detect driver installer and tried to run that and ran into the same problem.
Here's the AMD install log:

I've run an sfc /scannow and that came up clean. I then tried to manually install the driver through Device Manager, but that didn't work either (There is no driver selected for the device information set or element.).