https://community.sophos.com/sophos-xg-firewall/f/discussions/131229/xg3300-will-not-load-latest-firmwareCurrent version is SFOS 17.5.16 MR-16-Build830. I have two XG330 firewalls in HA mode. SFOS 18.5.1 MR-1-Build326 appears to be on the firewall but will not boot up. Everytime the firewall reboots it reverts to the 17.5 version. Steps taken: 1) Manuallyen-USTelligent Community 12https://community.sophos.com/thread/482458?ContentTypeID=1Mon, 15 Nov 2021 23:45:39 GMT4be5eb7d-caa4-4ff5-8e60-8f9463545a35:12c0a613-e7a1-48fc-a111-d76399f6e0carfcat_vk<p>try breaking the ha and see if one&nbsp;of them will&nbsp;update. there are significant changes between the versions.</p> <p>ian</p><div style="clear:both;"></div>