This is a flashing guide to help get any stuck Focus and Omnia 7 owners back on track or let you experiment with new ROMs.
It should be almost the same for other phones too, just do a bit of research to find the correct version of the various tools and ROM files for your specific device.
But sometimes there is a good reason which makes you think “I need to take control and sort this device out”.
You boot into MAGDLDR by holding POWER + VOL DOWN + CAMERA then release when it vibrates/logo appears. You can’t boot into a loader when a USB cable is attached or Zune is running because that causes the phone to immediately restart or get taken over by Zune locking out access from the update tools.
The Update WP components were installed from a download called “WP7_update_tool” or the same from the tools subdirectory of the “WP7_Update_CAB_Sender” file.