You need to reinstall Video, Sound, networking (lan and wifi), chipset, anything that windows indicates you don't have installed. Asus makes different series laptops with different hardware inside for that series. This laptop uses 2 different wifi cards intel or azurewave. You need to get the specs of your laptop to determine which proper driver to install. Sometimes you can install intel and during the installation it simply says 'No Intel hardware found' or something to that. Then you know it is Azurewave.
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Please visit the ASUS USA and ASUS Canada websites for information about locally available products. All specifications are subject to change without notice.