Install microsoft security essentials to stand alone PC.

Dear Sir

Could you teach me how to install microsoft security essentials to stand alone PC, because internet access to this PC is prohibited, but virus may be infected to this PC by flash drive or CD-R.

Thank you so much for your helps.


I hope you don't mean that the PC is already infected. If so, see this:


If you simply mean that the PC has no Internet Access, installation can be performed by downloading the appropriate installer from  the official MSE download page. Select Locales and Languages to pick the version you need.

Be sure that you have removed all other security from the PC first except for the Windows Firewall. If Defender is installed and it is XP, remove Defender, too. On Vista/7, Defender will be disabled during the install.

Once you have installed MSE, it will immediately need the definitions and latest engine - download them from here -

Save the installer and the definitions file to a USB flash drive to carry them to the PC without network access.

You will need to manually download the updated definitions file preiodically, too. I recommend at least weekly, but you can do it daily, if desired.


~ Microsoft MVP Windows Live ~ Windows Live OneCare| Live Mesh|MS Security Essentials Forums Moderator ~

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Question Info

Last updated September 3, 2020 Views 13,200 Applies to: