You have covered a lot of ground here - however, we would like to see some of the detail if possible to copy onto one of the working machines - ipconfig /all and also a picture of device manager and Xirrus - detail of how are all below
Would you post back the firewalls you have and try and disable
Also does it work if connected by cable to the router
Also try "safemode with networking" - as the PC pc starts tap F8 and you should get the menu to choose "safemode with networking"
Also would you check all these service are running - if any are stopped and they restart - particularly DHCP Client - do a reboot and see if it stops again - these are symptoms of a virus going around
Quote:
From a Johnwill post
Check your Services are Started on all PCs: - COM+ Event System (for WZC issues)
- Computer Browser
- DHCP Client
- DNS Client
- Network Connections
- Network Location Awareness
- Remote Procedure Call (RPC)
- Server
- TCP/IP Netbios helper
- Wireless Zero Configuration (XP wireless configurations only)
- WLAN AutoConfig (Vista wireless configurations only)
- Workstation
Note: You can check the services in Control Panel, Administrative Tools, Services.
All of these services should be started, and their startup type should be automatic (or perhaps manual).
If a service is not running, open it's properties and check the dependencies. Check each of the dependencies and see which one is preventing the service from running. Checking the event log is also a good idea here, there may be clues to what is failing.
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------------------------------------------------------------------------ {ipconfig /all}
If you cannot access the internet with this PC, then you will need to paste the results into something like notepad and then copy onto a machine that can access the internet and post results here
We would like to see the results from ipconfig /all post back the results here
-> Start
->
(XP - enter the following in the RUN box) cmd /k ipconfig /all
->
(Vista or Windows 7 - enter the following in the Search box) cmd /k ipconfig /all
A black box will appear on the screen -
rightclick in the box
select all
enter
control key + C key - to copy
then reply here and
control key + V to paste
------------------------------------------------------------------------ {Device Manager}
Post back the results in device manager
Start > control Panel {Vista set to classic view}> system > {Vista, device manager on left hand side} {XP hardware Tab, device manager button} >
windows 7
start > control panel> System and Security> Device Manager
network adaptors, click on the + > post back the devices listed there
are there any ! ? or X
post a screen shot of the device manager - network adapters
To post a screen shot of the active window, hold the Alt key and press the PrtScn key. Open the Windows PAINT application and Paste the screen shot. You can then use PAINT to trim to suit, and save it as a JPG format file.
To upload it to the forum, open the full reply window and use the Manage Attachments button to upload it here
------------------------------------------------------------------------ {run Xirrus Wi-Fi Inspector} Download and install
If you cannot access the internet with this PC, then you will need to copy the program across to the faulty PC
http://www.xirrus.com/library/wifitools.php
Then run the program
if you get an error - You need
NET Framework installed for the WiFi Inspector to function.
post a screen shot of the program running - if there are a lot of networks showing can you click on "networks" top lefthand area - so we can see all the network information, and also post which network "Adapter Name" (1st column) is yours on the list
To post a screen shot of the active window, hold the Alt key and press the PrtScn key. Open the Windows PAINT application and Paste the screen shot. You can then use PAINT to trim to suit, and save it as a JPG format file.
To upload it to the forum, open the full reply window and use the Manage Attachments button to upload it here.
------------------------------------------------------------------------
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Solved: "Media Disconnected" In IPCONFIG, can see network in Xirrus 
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