On installing my Nokia N72 on my PC, the PC reports me that the bluetooth peripheral driver was not found and thus the installion remains unsucessful. how can i fix this problem so that i can use the net through my phone

Download from google that nokia model no with software try this on google

Bluetooth peripheral is your personal computers bluetooth, open your bluetooth device on your computer so that the your pc can recognized it immediately. if you are using a bluetooth dongle, or usb bluetooth device, try running the installer of the bluetooth dongle device (cd together with the bluetooth dongle) and after installation or during installation if the program ask for your bluetooth, connect it immediately.  the same thing with your phone, open the bluetooth for your phone and let the pc suite for nokia phone search for your phone's bluetooth and auto install it.  to use your phone as a connection or modem connection, you need to pair your phone and computer first, you need to add your phone as bluetooth device on your computer. once added, run pc suite and configure pc suite connections through menu and search for your phone using bluetooth. from then, you can play with your phone, back up contacts, back up files, or use it as a modem with right internet access settings. 
take care...