Large & Extra Large Icons Blank?

My client's computer was infected with a virus obtained via Facebook. I removed this and multiple other infections (and I'm pretty thorough with my scanning). She gets it back, starts working on it, and apparently her devices and printers icons are blank. Not missing, like with a "blank page" icon, just... blank. Here's the kicker: it only happens with large and extra large icons. It also happens with normal folder icons. When I change it to medium or lower, they come back. I've tried rebuilding the icon cache database several times, tried sfc /scannow, tried chkdsk, tried uninstalling any recent updates, etc... There have been no hardware changes, the hard drive has been tested as good (no bad sectors), her dual monitors are at a sane resolution, and I'm confident that the viruses has been removed.