What service packs and or patches do i need for version 10.3.1.
when i pan around the map sometimes it freezes up, and at the bottom left of the screen it says drawing (Ex. .sid file or a layer file ).
here they are Esri Support 10.4 (10.4.1) select your version on the right
Adding to Dan's suggestion as you specified ver. 10.3.1
Esri Support 10.3 (10.3.1) - Downloads
Also, consider Resetting your ArcGIS application profile
Retrieving data ...