This is explained in Clean Reinstall - Factory OEM Windows 7.

May I ask why you would ask for our help and then not follow the detailed steps to get and keep a perfect install? Did you want some other kind of install?

Plug in by wire and enable Automatically deliver drivers via Windows Update (Step 3), watch for animation showing driver being installed in System tray.

If not download and install the network driver from the Support Downloads webpage for your model PC here: eMachines Support - Downloads & Support Documents - Desktop / EL Series / EL1360G

Once you get online enable Automatically deliver drivers via Windows Update (Step 3) then run all Important and Optional Windows Updates, with requested reboots, until no more are offered. This should provide most other drivers, but if any are missing find them on the same eMachines downloads webpage for your model.