Printer driver is not compatible with Vista
and why you post this here in forum for Toshiba notebook if your printer is not even a Toshiba product?
The driver for printer should be requested from the printer manufacturer and not from notebook/computer manufacturer.
I assume this is an older printer and the drivers were compatible only with Win XP and older.
So contact the printer manufacturer to get the drivers for Vista or Win 7
PS: How about these driver: