integrates Windows Defender on Windows 8
, a more robust version of Windows Defender (and uses that name) for its anti-virus and anti-malware protection. Although it uses the same name, it is not the same as Defender in previous operating systems. Windows 8 Defender provides the same level of protection
against malware as Microsoft Security Essentials (MSE) and uses the same virus definition updates.
Since Windows 8 Defender includes anti-virus protection, it may be disabled by the installation of a third-party anti-virus program. If a trial anti-virus came preinstalled
on your computer, it most likely turned Windows 8 Defender off (disabled) to avoid conflicts. Windows 8 Defender will remain disabled until the third party anti-virus has been completely uninstalled and then Windows 8 Defender needs to be activated
if you choose to use it.
Since you are already using a free version of Kaspersky for one year, I would recommend to continue with it and see how it performs. Kasperky has a very good reputation. When approaching it's expiration, if you are not satisfied...that is the time to consider removing it and enabling Windows 8 Defender.