It looks like Driver Verifier is catching a bug in the WinCDEmu's virtual device driver. The driver itself is dated Aug 8 2011, so you may wanna update it, or perhaps switch to another solution for mounting ISO's. Often times virtual drive software can be rather buggy so it's imperative to keep them updated as well as keep yourself aware of alternative options in case the bugs for your current software aren't getting fixed.
I'm not entirely sure the bug in this driver is actually the cause of your recent crashes, but that's what Driver Verifier is detecting as being a problem, so you'll want to take care of it, then turn on Driver Verifier again and send us any crashdumps for any new crashes it may cause. Basically we're using Driver...