gregrocker said:
Follow the steps in Clean Reinstall - Factory OEM Windows 7 starting with the ISo and tool to burn to DVD and you will end up with a perfect install IF you follow the steps.
If you had read the steps in the blue link it explains the answers to your questions. Put your ethernet or wireless driver in your backup so that if the installer doesn't have it you can install it to get online and do all of your Windows Updates which should deliver all of your drivers. Then it tells you what to do if any are missing.