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For you to use the Wireless and Bluetooth of you laptop you need to install the latest driver so that it will be detected by the computer and works properly. Click Here to download. Select the Type of Operating System that youre using wheter it is 32 or 64bit. The drop down is located on the upper right part of the website.
There is generally a button or switch that will enable and disable the wireless hardware on your computer. If it is disabled via software instead of hardware, you can go to the control panel, and look for your network settings. You can find your wireless adapter, and make sure it is not disabled.
Right click my computer - properties.
click on the hardware tab.
click device manager.
(here you will see all your hardware devices, click on network adapters and you will see your wireless card)
go into it's properties.
you will se an option to role back the drivers to what was previously there.
confirm this and wait and see!!
Ok.. This is the downloads site for ACER support site. ftp://ftp.work.acer-euro.com/notebook/aspire_4520/vista/Drivers However there are two wireless LAN drivers in that directory. You should find out which one is yours. To do this click start->right-cllcik on computer. When the system window opens click on device manager located under tasks on the left hand side. When the device manager opens double-click on network adapters and one of the two devices(Atheros wireless LAN or Broadcom wireless LAN) will be listed. Download the respective driver and your wireless would be up and runnin' ftp://ftp.work.acer-euro.com/notebook/aspire_4520/vista/Drivers
what do you mean wireless key ? is it wireless usb ? or wireless card ?
did you buy it from acer ?
if it is wireless usb adapter, just plug it in the usb port and install the driver for that usb.
if it is wireless card (acer). Open the back of your laptop, you can see the slot. just insert your wireless card in to the wireless slot and attached the both wireless antena (is should be black and white)