VetMsg9x.exe VetMsgNT.exe (Computer Associates) Background task from Computer Associatesâ InoculateIT AntiVirus (formerly Vet AntiVirus). VETMSG9X runs on Windows 9x/ME while VETMSGNT runs on Windows NT4/2000/XP. This task watches for usage of the floppy disk drive and automatically kicks in to scan the floppy for possible viruses â then it lets you use the floppy disk. Recommendation : Essential for full protection of your PC by InoculateIT â leave alone.