Choose Your Language: International US DE ES FR
Hello Guest Login Here or

Microsoft Security Essentials 4.6.305.0

Downloading file: MSEInstall.exe
Please select a download mirror: External Mirror 1 External Mirror (64 bit)

This is the download page for Microsoft Security Essentials. If you encounter any problems in accessing the download mirrors for Microsoft Security Essentials, please check your firewall settings or close your download manager.

Microsoft Security Essentials is offered as a free download

Faster downloads? Get Download Accelerator Plus (DAP) free and increase your internet download speed considerably.

Security Information
Microsoft Security Essentials support inquiries or software troubleshooting are available only from its publisher/developer Microsoft Corp.. Although we constantly scan all the programs present on this website with a strong combined antivirus solution, for your improved security, we strongly advise you to check the downloaded files with a good antivirus and antispyware software.
Most Popular in Antivirus
501 / 1,352,511
Microsoft Security Essentials & ForeFront Client Security Definition Updates October 21, 2014
Protects your computer from any kinds of malware, virus, Trojans and spyware.
10,482 / 812,348
AVG Anti-Virus Definitions October 21, 2014
Latest AVG virus signatures
205 / 488,701
Avast Virus Definitions October 21, 2014
Latest avast! virus signatures
732 / 332,770
Kaspersky Anti-Virus Update October 21, 2014
Latest Kaspersky virus databases
146 / 234,604
McAfee Virus Definitions 7597
McAfee Virus Signatures
41 / 161,222
ESET NOD32 Antivirus 8.0.304.0
Good protection against threats
72 / 143,558
Win32/Sality Remover
Delete the Win32/Sality virus
103 / 118,661
Kaspersky Virus Removal Tool [21.10.2014]
Virus scanner and detection software
75 / 103,398
Quick Heal Antivirus Plus 11.00 (
Anti-virus software with a proactive defense
30 / 92,080