Get answers to your questions about Microsoft Security Essentials
Getting started with Microsoft Security Essentials
Alert levels in Microsoft Security Essentials
Is my PC infected with viruses or spyware?
How do I uninstall antivirus or antispyware programs?
How do I know that Microsoft Security Essentials is running on my PC?
What should I do if Microsoft Security Essentials detects malicious software on my PC?
Will my scan catch even the most recent viruses?
Frequently asked questions about malicious software
I can't install Microsoft Security Essentials
I can't start the Microsoft Security Essentials service
My PC runs slowly after installing Microsoft Security Essentials
Errors during virus and spyware definition updates or product upgrades
Troubleshooting update issues for Microsoft Security Essentials
*Your PC must run genuine Windows to install Microsoft Security Essentials. Internet access fees may apply while downloading.
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