Since 14 of april 2016 there is no longer possible to update MSE; after multiple attempts on several systems the result is always the same: error code 0X800700c1! My guess is microsoft stop porting MSE updates to XP version of MSE! What good AV can still be used with XP - good performance and low on resources?
Microsoft Security Essentials Updater for download and update the definition.
(for Windows XP x86/x64, Functionality not tested on other versions of Windows!)
Download: here
Download via Webproxy: here
Password:
P&n"y9j5V23Khb1%vA7vM9CreU3BYzI429TD$h6K§
Update V1.9 on 05/02/2019
Update V1.8 on 04/30/2019
Update V1.7 on 04/25/2019
Update V1.5 on 04/01/2017
Update V1.3 on 07/11/2016
Update V1.2 on 05/14/2016
Update V1.1 on 05/02