More details –
This happens when mounting multiple ISO images. After mounting the first image, select a second image, choose the […] button to the right of the drive letter, and change the state of the “Require administrator rights (UAC)” checkbox. When I click OK on this advanced settings screen, the system bluescreens. Doesn’t seem to matter whether I am setting or clearing the checkbox, all that’s required is to change its state.
The system doesn’t actually have UAC enabled, if that helps.