Does CAVS run on Windows 2003?
As of CAVS version 18.104.22.168, it will run on Windows 2003 32 bit, but does not support the 64 bit version. This will be added in a future release.
CAVS 2 can fail if Active Directory is configured and active (tx bigben for pointing this out).
There have been reported issues with scheduled scans on Windows 2003 32 bit.