I have a problem which has been eating my head since long..  i know compared to what you guys do around here what i have is a very simple stuff.. But i would sure appreciate it..

I have an acer laptop 5738g, 320 gb HDD, Windows vista 32bit, 4gb ram..  it has 4 partitions...about a year back my system had crashed.. i took it to the repair guys.. they repaired it and installed a back gho file in the D drive..

recently my system got infected with a malware.. and i want to restore the back up... Can anybody please tell me how to go about doing it?? i downloaded the norton ghost 15 trial version.. Do i have to purchase the full suite?? after purchasing how do i use it to restore my system? or is there any other way i can go about it without purchasing...

i would be very grateful if somebody could help me out here.. thanks!