rictersmith,
Further testing shows me that removing the /disableclientqueue does not resolve the issue because there is no "real task id" that is being queued on the core - but the task queuing is the reason why you are seeing failures to reinstall.
Your best bet honestly would likely be to add a line that kills the vulscan processes if there are any - just before attempting to install. (you will need to re-arrange the remcopy/exec numbers)
REMEXEC16=taskkill /IM vulscan.exe /F
Unless your TAM is able to figure-out a way to get the queuing to work correctly.
Let me know if that helps,
Peter
*Edit: fixed it from REMCOPY to REMEXEC.