Can anyone explain this speed loss?

I recently had to relocate my router to have a wired connection in the house, then returned it to where it was after the project was finished.

My laptop lost a lot of connection speed that didn't affect the other computers on our network. I had been getting "same IP address being used" errors on it during the project I was doing so I thought it was responsible.

When the problem persisted even after everything was set back as before I rolled it back to its last image but the speed remained less than half usual.

It seemed like the only cause could be a failing wireless adapter since the other computers on the network remained at the same speed.

As a last resort I clean reinstalled and now the laptop has regained all of its original speed. Does anyone have an idea what could have caused this since the problem persisted even after reimaging but corrected after clean reinstall?

I used to have this error on two netbooks at the same time:

same IP address being used

Can't remember what I did to fix it.

I think I tried resetting the computer and router and removing it from Manage Wireless Networks.

Error would go away when I'd restart it. My roommate had a new Ipad plugged in so it could have been that, or the PC I had here that I was working on.

A week later and the problem has returned to the clean reinstall. Start up for the day and speeds are slow, while other computers on network are still fast.

Does anything about this suggest wireless adapter failure? Flash Player problems? At one point on a player the flash crashed is the reason I ask. Is there a way to test these or other suspects?

I have a wand across the country which I'll bring back with me to test that way. Other ideas?

The PC which was apparently generating the IP address conflict has left the house.

Thanks for sharing any expertise on this!

We have a Linksys 300N router here, which I have access into. I reset it a few days after the problem arose and nothing changed. Wired connection for all computers tests at 30 mbps, while wireless on all other computers holds around 20 mbps, except for mine now which is right now testing around 5 mbps.

This is an old HP 510 business laptop which refuses to die and runs Win7 fast, with Intel Pro Wireless 2200BG adapter which has held up fine until now. I wonder if there's a way I can test it other than taking it back to Calif on Thurs and trying our network there, then if necessary plug in a USB wand to take to MVP Summit and back to Florida.

I'm certainly open to all suggestions, and thanks.

Does it do this whether connected physically or wireless?
Any new apps/programs that might come to mind?
Does it make any difference at various distances?
Have you tried using a usb wireless if you have one? Or borrow one?
Like others have said it could a whole bunch of things. Hardware failure, signal interference, too many pc's on same wifi channel.

You can set a fixed IP address for your computer.