Installing AVG Free

Peter, Download & use the McAfee total removal tool (http://us.mcafee.com/apps/supporttools/mcpr/mcpr.asp).
AVG Guru

I keep getting error message 0xC0070643 which prevents me completing installation. Has  anybody got any ideas please?  This is a brand new computer and has only MacAfee pre-installed.  I can't find a way to "switch off MacAfee, in case that is the problem.

Peter, Download & use the McAfee total removal tool (http://us.mcafee.com/apps/supporttools/mcpr/mcpr.asp).
AVG Guru