So like, why doesn't swtor have a "save password" checkbox. Dumb.
This "fixes" that.
Download the bat file.
Change the "C:\PATH\TO\LAUNCHER.EXE" to wherever your swtor launcher lives.
Change the "YOURPASSWORD" to your password.
Run bat file as admin.
Create a shortcut to the bat file and you can make it run as admin every time.
Right click -> Properties -> Advanced -> Run as admin