I recently upgraded a Acer Aspire 5040 to Windows 7. After the upgrade I installed all the drivers and found the wifi was not working correctly. Everything looked fine but I could not see any access points to connect to. To fix this issue I had to go Acer’s support website and download and install the Launch Manager. Before installing I had to enable compatibility mode for Windows XP and select run as administrator on the setup.exe. After rebooting the lights on the front of the laptop turned on and I could now detect access points.