WinUAE Not Mounting ISOs
 

When troublshooting I ran into an issue where WinUAE suddenly stopped mounting the virtual CD drive after playing with the video cards

Completely removed the program and all it's files,

re-installed WinUAE
re-installed Workbench 3.1 with a good Kickstart Rom
The problem still persists like there's a config file hidden somewhere with a borked setting it's re-accessing

Closet I've gotten is a single reboot where it just popped up the two partitions the disc has as unknown drives called ????.

Instead of autodetect try "Image Mode".

If the problem still persists, try resetting WinUAE from the first menu "Path", below on the right you will find "Clear Disk History".

With WinUAE, after each emulation it is better to exit and restart it in a clean mode

Clearing Disks did it

Thanks for the help