Brother PT-9200DX QUICK REFERENCE Quick Reference page 19

G In the dialog box warning about replacing the driver,
click the Yes button.
H In the dialog box that appears, allowing you to confirm
how the installation will be carried out, check that the
installation will be carried out as desired, and then
click the Next button.
I In the dialog box warning that a digital signature could
not be found, click the Yes button.
J After the printer driver is installed, click the Finish
button.
K After installation of the printer driver is finished, install
the USB class driver as described below.
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(3) USB class driver installation
L Click the Start button in the taskbar, select "Settings",
click "Control Panel", and then double-click "System".
Click the "Hardware" tab, and then click the Device
Manager button.
M In the Device Manager dialog box, click the plus sign
next to "Universal Serial Bus controllers". Then, select
"USB Printing Support", and then select "Properties"
from the "Action" menu (or right-click "USB Print
Support", and then select "Properties" from the menu
that appears).
N In the USB Printing Support Properties dialog box,
click the "General" tab, and then check that "PT-
9200DX" appears beside "Location".