Safe Mode dialog box
If something causes Microsoft Expression Web to exit unexpectedly, the next time you run Expression Web, it automatically restarts in Safe Mode, which disables all add-ins.
To help isolate the problem that caused Expression Web to exit unexpectedly, try disabling all of the add-ins and enabling them one at a time until the error occurs again.
Exiting Safe Mode
When you restart, Expression Web will automatically start in normal mode.