Hello and welcome to the board.

Can you be a little more precise on the version.

KiXtart v4.12 or v4.21 or v4.22 - etc...

In general I don't think you will have any issues if you are using v4.12 or newer. If you can it would be best to run v4.22 which is the newest currently released version.

In my opinion you should update your code a little so that it does not run the McAfee update EVERY time a user logs on. Some users may log on and off 3 or more times a day and that would just waste bandwidth if you were to run it over and over.

Also you may want to pre-pend the Domain to the InGroup call like this.

IF INGROUP ("SomeDomain\MCAFEE")