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Network in Device Manager with Warnings beside them

Network Adapters with issuesWe've got a client computer in.  I've been looking for issues and noticed that in Device Manager there are multiple devices with the warning symbol next to them.  namely 6TO4 Adapter and isatap.{DBB7DC5E-B546-44C9-BC08-5711A4E7F68A}.  See attached image.
I have been able to uninstall most of them, but attached are a photo of those I can't uninstall.  I go through the uninstall process but they remain.

The Device Status for each is:
This device is not working properly because Windows cannot loca the drivers required for this device (Code 31)

For an internet connection the user has a wireless modem router thingy on the end of a long aerial.  It connects into her ethernet port.  How we ended up getting this computer to work on is that the Wireless company told the client to talk to us because it wasn't connecting to the internet.   That was caused by a setting in Windows Firewall - which I have now fixed and its connecting to the net.

I've never seen a 6TO4 port or an isatap port before.  Any ideas on what they're for (in laymans terms - I've googled them too and didn't get anything useful out of it).  If I need to get rid of them, how do I do that when right click uninstall doesn't work.  If I do need to keep them, what device are they likely to be for and where will I find a driver?
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3 Solutions
David Johnson, CD, MVPOwnerCommented:
6TO4  --> ipv6 to ipv4

Why don't you blow away the current network configuration and start from scratch.. uninstall the network adapter and reboot.
bosshognzAuthor Commented:
Can't uninstall the adapters - thats the problem.  Right click on them and uninstall and after that the device remains.
David Johnson, CD, MVPOwnerCommented:
even the SIS driver?
from an administrative command prompt

netsh int ip reset
netsh winsock reset

reboot computer
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Try Safemode?
This may free any dependencies, unplug any devices such as Ethernet cables USB stick etc.
in Device Manager>go to VIEW at the top tick to show hidden devices, do you see any other problem devices?
Uninstall all of them.
So that when your reboot windows will find new hardware automatically.

Is this XP or windows 7 ?
ISATAP (Intra-Site Automatic Tunnel Addressing Protocol) is an IPv6 transition mechanism meant to transmit IPv6 packets between dual-stack nodes on top of an IPv4 network.
Unlike 6over4 (an older similar protocol using IPv4 multicast), ISATAP uses IPv4 as a virtual nonbroadcast multiple-access network (NBMA) data link layer, so that it does not require the underlying IPv4 network infrastructure to support multicast.

Control Panel\Network and Internet\Network Connections
on the left open >change adapter settings
then rightclick Local Area Connection/properties
Local Area Connection
bosshognzAuthor Commented:
ve3ofa:  Can uninstall the SIS driver and it reinstalls itself.  The other 3 won't uninstall.
Netsh cmds did nothing except to prompt me to restart the computer.

Merete:  Sorry I posted in the tags it was Vista Home Basic.  Booted to Safe and there are roughly 20 or so of each of the 6TO4 and isatap drivers in there and all look to be working correctly.  I tried uninstalling some of them but the list never gets smaller.
I just saw that, sorry I missed that.
What problems is this user experiencing? other than problem devices?

These hardware devices that have a problem would say to me an onboard network card hardware issue possibly.
Is it onboard network chip?
Or a PCI network card?
If it is onboard you may have to look into the manufacturer mainboard drivers.
If it is a PCI card you could remove it.
Devices with a problem look first to the host, which should be the Sis191 Ethernet controller, is the Ethernet cable faulty/seated right?
Did you remove it?
if they won't uninstall try dis-abling the Sis191 Ethernet Controller.
Remember this is part of the mainboard and is activated when the Ethernet cable is installed / inserted.
Update drivers for it?

The only way to find the problem here is a process of elimination.

I have to go to work now , I'm in Australia.
Will check in when I get home.
Try unplugging any cables network related
bosshognzAuthor Commented:
It was brought to us not being able to connect to the internet - a setting in the Windows Firewall was blocking network access.  I allowed that and it connects to the internet via the user's wireless internet modem connected through the ethernet port.

Is it onboard network chip? Yes

I have been applying updates - the computer didn't have ANY updates installed on it.  I installed SP1 earlier this morning and SP2 has just finished.  WOULD YOU BELIEVE!  Installation of SP2 caused those issues to disappear!

I've  had it drummed into me to keep a computer up to date but its never had an effect like this before!
Hi bosshognz
So the problem is solved now?
Updating to SP2 ?
bosshognzAuthor Commented:
Yes it is.  Was waiting to see if anyone had anything else to say before assigning points.  Technically I solved my own problem, but I wanted to wait to see what I thought later.  Now looking back, I see I did ask for information on what I was seeing as well as a solution and thats what I'll award points on.  Thanks to you both, Merete will get the bulk for providing a more indepth explanation
Thank you for your generosity bosshognz glad I could help.
And good job !!
Maybe your solution can help others now :)
Regards Merete
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