See my comments inline:
>> 1. How do you connect to the Internet? Cable? DSL?
> DSL. Other computer connect just fine - even after I switched cables
> with the nearest one.
>> 2. Is the cable/DSL modem a combination modem/router or do you have a
>> router plugged into the modem's WAN port?
> DSL modem -> Linksys Router -> patch panel in basement -> computer room
> upstairs -> local hub -> four computers
>> 3. If you have a separate router, what is it?
Linksys what? Have you checked with Linksys to see if this router supports
Vista? If it is very old it may not. Does it have the latest firmware?
Routers doing DHCP do not normally assign duplicate IP addresses and this
points to something being wrong. Or if the router is elderly it may just be
dying. Are you really using a hub or a switch? If a hub, replace it with a
switch. Hubs are very old technology and can cause issues on a LAN.
Switches are inexpensive.
>> 4. Are you plugging the ethernet cable into the router? If yes, have you
>> tried plugging the ethernet cable directly to the modem, bypassing the
> See #2
I don't see where you answered this so I take it that no, you haven't
plugged the Vista machine directly into the modem with ethernet. I would do
so. Successful troubleshooting must be systematic and not scattershot.
>> 5. Have you power-cycled both the modem and the router and then tried
> Not part of the problem. Other computers running fine.
You don't know if this is part of the problem or not unless you've tested
it. Again, when troubleshooting you must be systematic. But leave it for
>> 6. Can other computers on the LAN access the Internet?
>> 7. The Alternate Configuration is for when you want to have two unrelated
>> setups for Internet access on one adapter, not for "forcing" wired
>> access. Example - if you need a static IP address at work and a dynamic
>> IP address at home.
> I can find no alternate configuration setup anywhere. I use static IP
> address on my LAN. I used to have DHCP but the router kept
> double-assigning addresses at times. On the laptop, I have tried
> several times to create a completely new connection using the wired
> adapter but cannot find out how to start any sort of wizard to do that.
> When my wireless A/P is working, I can connect wireless just fine, but
> when I turn the wireless adapter off and plug in the cable SOMETIMES it
> will connect, but it uses the name of my wireless setup on the info
> pop-up over the notification icon for my LAN. This doesn't sound right
> to me. There should be some way of setting up a wired connection from
You don't need the Alternate Configuration if you've assigned static IP
addresses and turned off the Linksys's doing DHCP.
>> 8. What have you already tried?
> A load of IPCONFIG commands. rebooting, several times. plugging and
> unplugging the cable (connect LED goes on and off + port LED on hub goes
> on and off also).
>> 9. Did this ever work? If yes, what changed?
> Yes; nothing. Worked last night, but not this AM when turned on (and
> rebooted three times)
Possible hardware failure then rather than software. What happens when you
connect the Vista laptop directly to your modem? If nothing, then there may
be a problem with the laptop's NIC.
>> 10. Is the ethernet adapter enabled? Look in Device Manager to be sure.
>> (Actually this is the first thing you should check but I don't feel like
>> renumbering my entire reply.)
> Device manager shows all is fine - even with "show hidden devices"
> enabled. No flags.
> There are a couple of things in the Event Viewer, but I'm not sure if
> they relate. They are COM+ events though:
> The application-specific permission settings do not grant Local Launch
> permission for the COM Server application with CLSID
> to the user NT AUTHORITY\SYSTEM SID (S-1-5-18) from address LocalHost
> (Using LRPC). This security permission can be modified using the
> Component Services administrative tool.
> I looked up the ClassID and it turns out to be "local launch permission"
> for an IPDevice. This could possibly be the culprit. I ran the
> Component Services applet and took a look at all the COM items (big
> list) but couldn't find any security issues out of order. If there is a
> connection between the CLSID and a particular device (without searching
> each and every COM device in order) I sure wish I could find it.
> Searching the Registry is my only recourse.
If you do a Google search using this search term, "permission settings do
not grant Local Launch permission for the COM Server application" you will
get a lot of links about that error message. I would not go chasing after
it at this point but rather would do the troubleshooting I suggest above
first. If your Vista machine's NIC has died or you are using an old hub or
your router has a problem, solving that will probably resolve the error in
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