Installing sqldeveloper.

Hi evryone,

I've got 2 issues with me...

1)I've got a laptop(Compaq ct 786tu) with core 2 duo processor wid 1.833mhz and 2gb ram. Its compatible with windows vista but i've installed with win xp as i've personally find win vista uses lotta resources and 2gb of ram is not enough. Now am facing problem with my HD connexant audio bus driver. Even i've checked with compaq tech support guys(No hope). Later i've found some driver n got it installed but the sound quality in my lap is too low. Can any one suggest me a soln to increase the sound quality in my lap.

2) can any one provide me the steps to install sql developer in my lap.

Thanks in Advance