Well,
Let me tell you my experience with this problem.
I run windowsXP with Sygate. I have Linksys wireless drivers installed on my computer(Although the device is not used anymore). Program being in C:\WINDOWS\System32\drivers\ndisuio.sys. I used my logs to check out who this program was contacting. I did some tracing and found that it connected to companies like Comcast, RoadRunner, Verizon, TimeWarner and so on. It also contacted this company called Brandenburg Telephone Company. I got their contact information. I called them up to ask what they knew(more for amusement) and ofcourse they gave me a blank answer, kinda funny. Anyway, on the other hand. I called up Microsoft and asked. After spending about 2 hours on the phone, they said they would email me(like all

up companies with bad tech support say). My conclusion for this problem is not that it is trying to hog all your bandwidth, but it is trying to download certain files from seperate sources. Like KaZaA grabs parts of files from different users. THIS IS A WIRELESS PROBLEM. It does not mean that you are using wireless, it means that one of your programs on your computer is calling for this driver.
I went to Administration Tools in Control Panel and then to Services. Down to Wireless Zero Configuration. I looked at the "Path to executable" and noticed that it was "C:\WINDOWS\System32\svchost.exe -k netsvcs" I know from previous expererience that svchost.exe is a RPC(Remote Procedure Call) service which allow users to exploit your Windows system and run any code of the hacker's choice. As for a solution to this, you are able to patch this up:
HereOther RPC exploits can be searched for on the Microsoft website and patches can be downloaded.
Now that you have RPC patched and more secure(notice the *more* in there, Windows will never be secure, switch to `nix

), disableing the service is your best option(read above). Do not delete this file!
Also, this file often attatches to your network device so go to Control Panel, then Network Connections, then right click on your active network devices. Go to Proporties. Make sure that you do not have any unusuall(I only stick to unusual because it varies depending on what you have installed for Windows, generally, anything not signed by Mircosoft and your device's company).
Another thing that is highly recommended is enableing the firewalll on your device. While still in the Proporties for your network device, click on the "Advanced" tab and check the tab to enable your firewall.