My laptop came with Vista Home Premium pre-installed and last week it completely messed up so I decided to install XP.

Now I can't boot into Vista (goes straight into XP) and because Vista was pre-installed I don't have any drivers for XP. I can't connect to the internet at all -- no wireless network available.

Please, does someone know how to fix it so I can boot back into Vista, or how I can set up my XP to connect to the internet?

I really don't know what to do. Please help!