Not getting internet/wireless access

Hello,
Acer laptop 3690 aspire i reformatted the computer cause it had windows vista on it by the factory, and ran very very slow and choppy since the processor isnt very well (and only 1g ram) I changed to windows xp home edition, i downloaded the drivers i needed and now it wont get wireless connection or LAN, no network adapter is installed an im assuming thats the problem since it got access before the format (Wireless and LAN) and also which is the best way to check "specs" on the comp please someone help!