neko1178 :
Aspire 5742Z like I stated up there
If you don't know which driver is correct for your device, you may need to use automatic driver finder software to identify the driver correctly. Most of such tools can help find the outdated and missing/improper drivers without effort. Some are free and some are paid, if needed, try
free tool at first.
Remember that don't install incorrect driver on your computer, or it might ruin your whole computer performance.