avast xp support

does avast export windows xp after the end of microsoft xp

Guess you mean support, not export. :wink:
The answer is yes.

AVAST will continue to support Windows XP for home and business users
http://blog.avast.com/2014/03/12/avast-will-continue-to-support-windows-xp-for-home-and-business-users/