Sorry for the inconvenience and I assure you that subscriptions can be refunded by Customer Service if the problems can't be sorted out.
My first thought on this would be Power Options > Advanced in Control Panel - is the connection timed to go off.
or...have you inadvertently set the type of connection you are using to a Public one rather than a Home one.
That setting is in SecurityCenter > Web and Email Protection > Firewall > My Network Connections
Other than that I can't think of anything that would cause this so your best bet is to contact Technical Support.
I see you are in Malta so phone support would be long-distance therefore it's best to use the Online Chat option here: http://service.mcafee.com/faq/country.html
It's open 24 x 7.
My connection is set to home connection not public.
The connection shuts down for 2 minutes every 15 minutes, at any time of the day, so it's not a power issue, nor parental control issue (parental control is deactivated anyway)
It's been like that for the last 6 weeks. One only has to wait 2 minutes for the connection to come back. It doesn't apply to the programs which the firewall has validated. I can play online poker, or online video games without getting disconnected (fortunately) but anything that happens through a browser/navigator gets shut down for 2 minutes. It has to do with security settings obviously.