Some things will cause windower to crash. One of the main causes is updates to FFXI breaking plugins and Windower.

After a patch, if your game crashes on load, please check the Windower News Forum for news from us.

Disable any broken plugin until it is fixed.

A few things are known to cause windower to crash

• IR Devices - Please disable IR devices before using Windower. ~TODO~ someone link to a guide here.
• XFire - You can not use XFire with Windower & FFXI
• STeam - You can not launch Windower with Steam
• WindowsBlinds/AlienWare Skinning (Any 3rd Party windows skinning) - These will crash FFXI - Use uxtheme.dll hack or disable pol.exe from being skinned.
• ProcessGuard - Will likely cause problems with windower - Thats what processguard is designed to do, stop windower from doing what it does.