We've just migrated 90 of our customers computers onto AVG CloudCare and all we did was sent each user an email link. This clever software downloads itself, uninstalls any other anti-virus software, then installs itself and registers on our portal so we can monitor the status.  We are now alerted to any infections they may be unfortunate enough to get but we can also clean and update these computers remotely meaing the customer is not inconvenienced.