Singer XL-420 Manuel D'instructions page 76

Now you are prompted to select the Program Folder where
the shortcut for the software will be stored.
to continue.
during the installation set-up.
Pressing the button will finally start the copy and
installation of the FUTURA software files to the given
A progress bar will indicate the stage at which the installation
will automatically close after finish. Please wait for a short
while until this happens.
If the installation utility identifies a lack of available space
on your hard disk, an error message will prompt you to free
CORRECT START-UP PROCEDURE
The following steps must be followed for proper start-up
protocol. If these steps are not followed precisely, you will
get a "Transmission Pending" error message.
Boot up your computer, but do not open the Futura
software. Next attach the embroidery unit to your sewing
machine and connect the USB cable between your
computer and sewing machine.
been moved to the highest position by turning the Hand
wheel towards you.
embroidery unit.
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open up the Futura Software.
your machine.
hoop, and you are now ready to use your large hoop.
Turn off your machine, close the Futura software and then
turn OFF your computer. Wait for a moment, turn on your
computer and then follow steps 1 through 4 above.