Sign up ×
Super User is a question and answer site for computer enthusiasts and power users. It's 100% free, no registration required.

Please read the whole thing before commenting if you would really like to help ! :)

I've had this problem for a very long time now and tried MANY different solution.

Here's the problem. My desktop computer is linked to my WiFi via a USB D-Link wireless adapter. It works fine, until I try to download large files via torrent, or simply download a lot, it crashes. My connection is lost.

Most of the time, I can just unplug it and plug it back in to make it work again. But sometimes, when I unplug and plug it back it my computer makes an unusual USB sound. It is pretty hard to describe a sound via words, but I think you know what I mean. Instead of doing the regular "tu-du" new device connected sounds, it makes this "tu-du-du" bad usb sound and I have to restart my computer to make it work again and it is extremely annoying.

So... here is what I have tried so far.

  • Updating the adapter firmware
  • Plug it in every available USB ports on my computer
  • Ran a certain command line someone suggested that I cannot remember.

Recently tho, someone suggested to me a solution that makes a lot of sense. To go in device manager, and uncheck "Allow Windows to disable the device to save power" under the power management tab of the adapter itself.

I was very exited about this solution, only to arrive at home and find the "Power Management" tab is missing under my device and many others.

So yeah, this is everything I tried so far. I am all out of ideas. And before you ask, the reason my computer isn't directly plugged to the internet is a long story and even tho I know it is the best solution it is not possible in my current situation.

I am running Windows Vista (SP1).

Edit: To be more specific, what I really seems to be happening is that thing where "Windows shuts down the adapter to save power" because let's say I'm downloading at 1.8mb/s, the speed will gradually go down until it reaches 0 and the adapter dies. It's really like windows kills the adapter and won't allow it to work until I restart. Unfortunately, the Power Management tab is not there for a reason I don't understand.

So thank you so much for reading me and I can't wait for your suggestions.

share|improve this question
What is the router you're connecting to? I've seen bad firmware on either side cause this - if it's an old router you might find that simply flashing the firmware will fix it. –  Shinrai Nov 23 '11 at 20:08
Try a different wireless network, try a different wireless network adapter. Try the adapter on a different computer. –  Ƭᴇcʜιᴇ007 Nov 23 '11 at 20:21
In addition to firmware for the router, make sure you have the latest drivers for the USB WiFi card, and make sure you've got the most recent Windows updates. –  music2myear Nov 23 '11 at 20:21
Yes, "flashing the firmware" = updating. –  Shinrai Nov 23 '11 at 20:26
Is the adapter getting warm? The wireless chipset could be overheating as there is very little air flow in the USB key WIFI adapters. –  Lamar B Nov 23 '11 at 20:34

Your Answer


By posting your answer, you agree to the privacy policy and terms of service.

Browse other questions tagged or ask your own question.