Wifi mystery!

I just had wifi set up a few weeks ago.
When someone is on my desktop PC and I'm on my laptop, it works fine for a while, but then it slows down and says Server not found.
It also interferes with my desktop PC when it's on.
When I shut my laptop down everything works fine.
My sisters laptop works fine simultaneously with the desktop. (When my laptop is off).
Wireless works fine on my laptop everywhere else.
I also tried to connect straight to the router via an ethernet wire, and had the same problem.
When I reset the router everything works fine again for about 5 minutes, then it says server not found.
I spent about an hour on the phone with Time Warner and they couldn't figure it out.
Does anyone know whats the matter?

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Clarification Request
What Kind Of Laptop?

Operating system? Make and model?

And because an infected computer can easily cause such issues, please follow the steps below to scan your computer for trojans and other malware:

If you can download the tools below on your current computer, and get them to work, then fine, but frequently the problem malware prevents the programs from running correctly. If that's the case, then download ALL of the tools below on a friend or family member's, CLEAN computer and copy them to a CD or flash drive, then transfer them to the problem machine and use them while in Safe Mode.


After transferring it to the problem machine, run the following tool to help allow the removal programs below to run. (courtesy of Grinler at
There are 3 different versions. If one of them won't run then try to run the other one. Be patient.... as a black window should open, then close after finding all the background programs.
Vista and Win7 users need to right click and choose Run as Admin
You only need to get one of them to run, not all of them.




IMMEDIATELY after running the "Rkill" tool above, run/install the Malwarebytes and SuperAntispyware installer and update files from the links below which you've also copied to a CD or flash drive, and transfered to the problem machine. Do NOT restart the computer after running Rkill.

Once downloaded and before transferring Malwarebytes and SuperAntispyware to the problem machine, rename the program installer "mbam-setup.exe" file to something else like "Gogetum.exe", then copy the installer file and the update file to a CD or flash drive.. Transfer the file to the problem machine, then install the "Gogetum.exe" file, then run the update to get the program current.. After that, run a full system scan and delete anything it finds.

Malwarebytes Installer Download Link (Clicking on the links below will immediately start the download dialogue window.)

Malwarebytes Manual Updater link

Next, install and run a full system scan with the SuperAntispyware program and the manual updater from the links below. As before, you may need to rename the installer file to get the program to install.:


SuperAntispyware Manual Updater

In a few situations, in order for the program to run, it was also necessary to rename the main "mbam.exe" file also after installing it.. It resides in the C:\Programs Files\Malwarebytes Antimalware folder....

And after that, if everything's fine by you can't connect to the internet, then follow the procedures below to check your network "proxy" settings again.

Open Internet Explorer and go to Tools-Internet Options-Connection Tab. Click on the LAN settings button. IF there is a check mark next to "Use a proxy server for your LAN", uncheck it. Click OK. Then OK, again.

Hope this helps.


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Clarification Request
The make and model of ...

the ROUTER is important too as several have had to have their firmware updated to function properly with Vista and Windows 7.

Sometimes the firmware on the wireless adapter itself needs to be updated.

I would also check to see exactly how the wireless adapter is configured as sometimes they get configured to access any signal and will actually disconnect from a strong signal to try to connect to a weak signal from a neighbor's router.

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