I installed Windows 7 RC (build 7100) on my Medion MD40100. It has an Intersil Prism Nitro WLAN card, but it isn't recognized and the wireless button doesn't work. Any clues how to get it working (always on in BIOS, ...)?

It won't even work if you download drivers directly from the vendor's website? -Nick

From what I can gather about this laptop, it may not work at all. Have you added any RAM? It shows as only having 512MB. It appears the website doesn't even support this laptop anymore. If that is the case then drivers may not be out there right now. Does device manager show it? Even as an unrecognized device? If it does, you can try going through action center's troubleshooter.