Why can't my computer connect to my router via ethernet?

Hi,

References to Vista also apply to Windows 7.

There have been known issues with Airlink Routers and Windows 7.

Airlink Support
http://www.airlink101.com/support/

Your router would be suspect here, have you updated its firmware as a possible solution? And I
would update your WiFi drivers on the computers. How far are you positioned from the router?
Are there obstructions in the way?

Try actually updating your driver and clearing the network logon.

Control Panel - Network - write down make and model of Wifi - double click on it - driver's tab - write
down version - click Update Driver (may not do anything as MS is far behind certifying drivers). Then
Right Click on Wifi Device and UNINSTALL - Reboot - this will refresh the driver stack.

Manually look at manufacturer's sites for drivers - and Device Maker's sites.
http://pcsupport.about.com/od/driverssupport/ht/driverdlmfgr.htm

Installing and updating drivers in Windows 7 (updating drivers manually using the methods 
below is preferred to ensure the latest drivers from System maker and Device makers are
found)
http://www.sevenforums.com/tutorials/43216-installing-updating-drivers-7-a.html

Download - SAVE - go to where you put it - Right Click - RUN AS ADMIN.

You can download several at once however reboot after you install each one.

After looking at the System Maker's you can check Device Maker's for even newer versions.
(The ones from System maker become your fallbacks).

Repeat above for network card (NIC) and is a good time to get other updated drivers as Windows
7 loves updated drivers.

I would also disable auto-updates for drivers. If Windows Updates suggests one just HIDE it as
they are almost alway old and you can look for drivers manually as needed.

How To Disable Automatic Driver Installation In Windows Vista - Drivers (Window 7 also)
http://www.addictivetips.com/windows-tips/how-to-disable-automatic-driver-installation-in-windows-vista/
http://technet.microsoft.com/en-us/library/cc730606(WS.10).aspx


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Make sure you know the login details for your wireless router - SSID and Password.

You will lose connection when doing this and have to redo your logon.

Control Panel - Network & Sharing Center - on Right Side click Customize - Set Network
Locations  page - on lower left click Merge or delete networks locations - DELETE ALL
instances of your network (and any others you no longer use) - REBOOT. Start - Connect
To to logon on to Network.

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Check this :

Strange Problem with Internet Connection in Vista (and Windows 7)
http://www.catonett.com/blog/archives/194

Windows Vista cannot obtain an IP address from certain routers or from certain non-Microsoft DHCP servers
http://support.microsoft.com/kb/928233/en-us

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And :

Using the Network troubleshooter in Windows 7
http://windows.microsoft.com/en-US/windows7/Using-the-Network-troubleshooter-in-Windows-7

Troubleshoot network connection problems
http://windowshelp.microsoft.com/Windows/en-US/help/33307acf-0698-41ba-b014-ea0a2eb8d0a81033.mspx

Why can’t I connect to a network?
http://windows.microsoft.com/en-us/windows7/Why-can-t-I-connect-to-a-network

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Also check with the System maker's support and their forums (if any). (They "may" have help on
upgrading your System to Windows 7.)

MSI Support
http://www.msi.com/index.php?func=service

MSI - Downloads (BIOS and Drivers)
http://www.msi.com/index.php?func=downloadindex

MSI - Forums
http://forum-en.msi.com/

MSI - Service
http://us.msi.com/index.php?func=service

MSI - Live Update On-Line
http://www.msi.com/index.php?func=downloadindex

MSI - Contacts - Set to North America - USA
http://www.msi.com/index.php?func=html&name=aboutus

Hope this helps.