Toshiba satellite L305D-S59222

Hello, I did the Reset toshiba satellite L305D-S59222 to factory settings,an it had window vista, wifi, webcam and word 2007 and I would want to install it again how can I do it because the computer askes me to insert a boot disk which i would want to know if its a especifice one or not? which one is it??? because this model is the new edition that when I brought it it had window vista install...so How can i download it ? the only driver I have is one that says usb series 2007-03..I insert that but the computer no sign of nothing? Help cause I need to install these files as soon as possible back again and the reason that i erase it as factory setting was because it had lots of trojan and other virus that I was amazed.