Problems connecting to internet

[lozziloz]

I have three computers using same internet connection. They connect through a D-Link Wireless G Router (DIR300) which is connected to a modem (nettcomm NB5 plus 4 adsl2+). I have been using the modem for almost two years and only 3 months ago started using the wireless router. One computer has had intermittent problems with this (of course, it is my favourite!). It has problems obtaining an ip address. Usually I reset or unplug the modem the router and the computer and this sorts itself out..... but not this time! Currently I cannot connect at all!! It still gives the same message that it has no ip address but i tried directly plugging in to both router and modem using ethernet cable and nothing. It acts like nothing happens. I have tried bothe firefox and explorer. The computer in question uses windows media centre as OS (which really is same as xp for most purposes). Any ideas??

[Broni]

Are two other computers OK?
You said, you tried to connect computer in question by a wire, straight to the modem?

[lozziloz]

Other two computers are perfect.. I am using one now on the configuration that I am trying to repair on troubled computer.  I have resolved the issue of not being able to connect via cable... so I can connect to either the modem or router directly and access internet but wireless still says "Limited or no connectivity"

[Broni]

Uninstall/reinstall network card/driver...

[lozziloz]

I am technically retarded... Can you please tell me how to do that.

[Broni]

Is it XP, or Vista?
Hold Windows key, and press Pause/Break key.

[lozziloz]

Thanks...
Microsoft Windows XP
Media Centre Edition
Version 2002
Service Pack 2

[Broni]

Go Start>Run, type in:
devmgmt.msc
Click OK.
Device Manager will open.
What do you have listed under Network Adapters?

[lozziloz]

1394 Net Adapter
Broadcom 440x 10/100 Integrated Controller
Intel(R) PRO/Wireless 3945ABG Network Connection

[Broni]

Download your driver from HERE
Don't install, yet.
In Device Manager, right click on Intel(R) PRO/Wireless 3945ABG Network Connection, click Uninstall. Restart computer. Windows will find it again.
See, if your connection is back. If not, we'll go from there, but tomorrow. Bed time

[lozziloz]

Thank You and Good Night (It's only 3:50pm here - I am in Australia) I will try and see how it goes.

[lozziloz]

It did not work... I will look for you tomorrow.

[Broni]

Go back to Device Manager, right click on Intel(R) PRO/Wireless 3945ABG Network Connection, click Properties>Driver tab, click Uninstall. Confirm.
Install freshly downloaded driver.
Restart computer.

[lozziloz]

IT WORKED! When I did it yesterday. It seemed to auto-install the driver and this time I double-clicked and went through installation wizard-so probably didn't even install yesterday. Only thing is as the troubled computer was my primary computer (and I only call it primary as it is my favourite and the one I set up network on originally) I will have to set up wireless network again. It now has gone back to default name of dlink with no security. So, one more question, do I need to uninstall old network details off others computers or, if I use the same config, will it be okay? Also, can you foresee any other issues? Sorry to ask so many questions at once. I have to go to work shortly and I figure that when I come home you will be asleep and this is when I will be sorting myself out, so I am trying to pick your brain in meantime.....

THANK YOU BRONI - I have been struggling with this for days, I am very grateful for your help and so glad I found Computer Hope.

[Broni]

Great news
I tell you what...create fresh Restore point, to start with.
Then start a new topic about your network configuration. I'm not that great with networking. Some other people here, are.
Make sure to post a link to this thread, so any helper knows what the situation is.
Good luck!