Although roblev's suggestion is possible, brace yourself for errors when you try executing mysql_num_rows() .. that is if u use Mysql and PHP. The PHP biinary for Windows web servers (that is PWS and IIS) is buggy
I suggest you download NuSphere MySQL (the free version, of course). It comes with Apache web server for Windows (which is where PHP should word nicely), PHP, MySQL, Perl, SSL, phpMyAdmin, etc.