Sure. As an end user it would be great to get a free AV bundled with the OS. Like we now get a firewall for instance. It would enable Microsoft to reaffirm its statement about security being number one. It could even be an incentive to those with pirated
copies of Windows to buy the OS to get access to the definition subscription.
But it's a dangerous path. The AV vendors just might not like being pushed out of business. It would be a similar situation to the one Microsoft is facing with the EU over the bundled Media Player. If their appeal is rejected they will have to remove Media
Player within 30 days.