FWIW, I woke up today to a BSOD on one computer caused by pxrts.sys. It took a couple reboots to get Prevx to load after that. A daily scheduled scan had already run. The STOP error was 0X0000008E. I've researched the common causes for this STOP error... memory failing, missing Service Pack or some hardware component needs replacing. Just thought I'd post it, like I said, FWIW.