How to recover drivers in my PC?

Hello,

Good day!

My laptop is Sony VAIO (VGN-C60HB/L). I installed new OS (Windows XP Professional-English Version) because the later OS (VISTA) was a Japanese version & got damage due to viruses.

My problem are the following:

1. All the drivers are gone. No internet connection. I cannot play music & No sound. DVD-RW drive is not working...etc...
2. I don't have recovery CD at hand. It was not included when I bought the laptop in Japan.
3. I want to recover all the drivers in my laptop but I don't know what to do.

To ALL who are able to help, please help me!

Thank you so much!!!!!