How to fix an Error Code -5003 0xffffec75 when tring to install WNA3100 software for a Netgear Wireless USB adapter

Your device is not suppoted by Win7.
NETGEAR Support Answer NETGEAR Product compatibility for Microsoft Windows...

Go to http://downloadcenter.netgear.com/ and enter you full model number where it asks... then select the software you want from the results returned. Beware that the WNA3100 and the WNA3100M DO NOT take the same software!

It looks like your NetGear WNA3100 is dead out of the box.
The software looks like it operating correctly (runs the installed diag, tries to detect, etc.), but
the software isn't having any luck finding the hardware.
The reason that the adapter is disabled in Device Management, is that the software seems
to have correctly installed the driver, but Windows couldn't detect (plug & play) the device, so
Windows didn't enable the device driver - Windows won't load a driver for a non-existent device.
Other (remote) possibilities:
(a) Wi-Fi adapter plugged into a bad USB port. - try another port.
(b) there's a little corrosion on USB contacts of USB port or WNA3100. Try plugging adapter
in and out of the port a few times (this shines up the contacts a bit).
(c) there's a slight misalignment of contacts within the USB connector or either the laptop, or
the WNA3100.
Your fix may be returning the NetGear WNA3100 to the retailer for an exchange.

You can download the software direct from their website located at www.netgear.com. Click on support, then download software/drivers and enter the model number of your adapter. then follow the prompts to download and install it on your pc.

Hi,
I Would guess, that windows is leaving the handeling of the wireless connection to the NETGEAR software, and therefor not registering the device ad connected.
To make Windows regain controle take a look at this: http://www.bukisa.com/articles/115878_how-to-let-windows-configure-your-wireless-network-connection-in-xp

Netgear does not have Windows 2000 drivers for this product. They are only showing drivers for Windows XP, Vista, and 7.

Click on the link below and follow instructions.

http://kb.netgear.com/app/answers/detail/a_id/17393

Try connecting direct to USB port without extension cable. Disable anti-virus software temporarily while installing drivers.

If the resource CD does not work then I would recommend you to download the installation software for the adapter from the below link:

http://kb.netgear.com/app/answers/detail/a_id/17393

Install the adapter using the software available on the link above.

I hope this information allows you to resolve this issue.

Regards

Anand

could spread some toothpaste on the cd, wipe it off then try the install again. used to work for me when i had scratched cd's