A MACC installation fails on Windows Vista clients when you run a batch file that contains the /qb+ switch. Below is an example of the batch file command:

[start /wait setup-win-vista-2008-x86-6.2.0.493.exe /v" /qb+ SERIALNUMBER=XXXX-XXXX-XXXX-XXXX-XXXX SHORTCUT=0 /l+*v \"%SYSTEMROOT%\S3Setup.log""]

No errors appear to indicate installation failure and no files are created under C:\Program Files\McAfee\Solidcore or under user temp directory.