Your Question: What Happens If You Install Microsoft Security Essentials on a Computer with Windows Defender?
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Windows Defender helps protect your computer from spyware and some other potentially unwanted software, but it will not protect against viruses. … If you have Windows Vista or Windows 7 and you install Microsoft Security Essentials, the installation process will automatically disable (but not uninstall) Windows Defender.

Can Windows Defender and Microsoft Security Essentials run together?

A: If Microsoft Security Essentials and Windows Defender are both running, your system may experience performance degradation and other problems caused by the conflict of two services providing real time protection simultaneously.

What’s the difference between Windows Defender and Microsoft Security Essentials?

Microsoft introduced Security Essentials to cover the gap left open by Windows Defender. MSE defends against malware like viruses and worms, Trojans, rootkits, spyware and others. … Installing Security Essentials disables Defender, if present, as part of its install procedure.

Maya Lin-Takahashi

Maya Lin-Takahashi

Consumer Tech & Gadget Reviewer

Maya is a hardware enthusiast who tests and reviews smart home devices, smartphones, wearables, and audio gear. She focuses on practical consumer value and build quality.

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