Looks like Microsoft has designed Windows 8 to put third-party security ahead of built in security, ensuring that built in security is a last resort.
Third-Party Anti-Virus Programs To Supersede Built In Security In Windows 8
One of the best features of Windows 8 is the built-in security software that ensures the machine is never fully unprotected and exposed to threats. However, it has now come to light that this security will turn itself off once it detects a third-party anti-virus program. So if you install something from Symantec, AVG, McAfee, etc. — your built in security will automatically shut itself down and handover all responsibilities to the third-party security solution.
There are two scenarios under which the built in anti-virus will become active — if there is no third-party anti-virus or if the third-party anti-virus does not have up to date signatures.
Whilst this seems like Microsoft’s way of appeasing the big security companies like Symantec and McAfee, an official from the latter informed the press at Computerworld that it is really for keeping the OEMs happy. This is because OEMs often thrive on bundling third-party software with Windows PCs. Once users subscribe to the bundled anti-virus for prolonging the initial license, OEMs receive some commissions. The built in security in Windows 8 threatened this revnue source and hence Microsoft decided to make it responsive instead of always present.
Windows 8 will continue the practice of warning its users when their antivirus is out of date. Additionally, it will provide them with information about how to renew their subscriptions. It will then fall back to Windows’ own security solution — Windows Defender. So what is the best way out of this?
If you are getting bundled anti-virus with your purchase, it is best to get rid of all bloatware and trialware and resortthe built in security within Windows 8.