My desktop suddenly can't access my Linksys router and can't get internet...???

I've got a laptop and a desktop here at home, both of which have always plugged into this Linksys router and have always worked great.  I just rebooted my desktop for the first time in awhile and now suddenly it can't access my router.  If I try to log into it with 192.168.1.1 it can't find it.  The laptop still can and works just fine as it always did.  

I tried removing the Ethernet adapter and reinstalling it on the desktop, still no help.  I tried resetting the router with no help, and again, the laptop gets it fine.

I can't ping the router from the desktop, I can't get internet, I can't get to the config, nothing.  

When I boot into Save Mode w/ Networking on the desktop my Network Adapters don't even show up!!  Not even in device manager.  I tried going disabling all startup programs via msconfig but that didn't help either.

Any information on what might have caused this and how to fix it would be greatly appreciate.d  thanks!
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Andrew AngellCo-Owner / DeveloperAsked:
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Irwin SantosComputer Integration SpecialistCommented:
replace your network card.
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Andrew AngellCo-Owner / DeveloperAuthor Commented:
do you really think that could be the problem?  when i remove it windows finds it and installs it just fine.  And in fact, you know what's strange...after I removed it and reinstalled it didn't have the static IP I had given it anymore, it's back to using DHCP.  Well, it seems to be picking up an IP just fine.  When I check it now it's getting 192.168.1.101 which is the starting point for the Linksys to hand them out.  

I still can't access the router config, though, and I can't ping the router from the desktop.
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Irwin SantosComputer Integration SpecialistCommented:
since you have a valid IP ....that's good.

-disable Windows Firewall
-disable any other firewall

report back
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Andrew AngellCo-Owner / DeveloperAuthor Commented:
Both are disabled (Windows and ZA) and still same issues.
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Andrew AngellCo-Owner / DeveloperAuthor Commented:
it's still setup with DHCP and ipconfig /all shows correct IP, default gateway, and DNS servers.
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Irwin SantosComputer Integration SpecialistCommented:
Can you browse the web  on that machine?
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Jeffrey Kane - TechSoEasyPrincipal ConsultantCommented:
Can you post an IPCONFIG /all ?  that would help in seeing what's going on.

Jeff
TechSoEasy
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Jay_Jay70Commented:
Hi angelleye,

you mentioned that everything works well but you cant get to the router

i take it you mean that you get inernet still yes?

you are deffinitely putting in the right address? http://gatewayIP   ?

Cheers!
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Andrew AngellCo-Owner / DeveloperAuthor Commented:
ipconfig /all looks like everything should be working fine:

Connection-specific DNS Suffix: angelleye.sytes.net   (this is my dynamic DNS service and I don't recall seeing this here before but I'm not sure.)
Description: NVIDIA nForce Networking Controller
Physical Address:  MAC Address shows here
DHCP Enabled: Yes
Autoconfiguraiton Enabled:  Yes
IP Address: 192.168.1.101
Subnet Mask: 255.255.255.0
Default Gateway: 192.168.1.1
DHCP Server 192.168.1.1
DNS Servers: 24.94.163.100 & 24.94.163.101

The machine can NOT access the internet right now.  I can't ping the router (or get to config via http://192.168.1.1) and I can't ping my laptop that's on the network either.

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Andrew AngellCo-Owner / DeveloperAuthor Commented:
I also find it very odd that when I boot into Safe Mode with Networking, and then I go into Network Connections, NOTHING is there.  Not my Thernet, not the FireWire stuff that usually shows up there.  Nothing.  When I go into device manager Network Adapters isn't even there.  

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Andrew AngellCo-Owner / DeveloperAuthor Commented:
Ok, I had done a system restore to yesterday and that didn't work.  As I said, I hadn't restarted my computer for awhile until right when this happened so I went ahead and did a restore back to a week ago and now it's working again.

The only thing I've installed this week was Trillian messenger.  Really, nothing else.  I can't think of what would have caused this.  hmmmm.....
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Andrew AngellCo-Owner / DeveloperAuthor Commented:
And yeah, now that it's working again, when I do ipconfig /all there isn't anything next to Connection-specific DNS Suffix.  When it wasn't working it was putting my dynamic domain name there: angelleye.sytes.net

Any ideas if that's what was causing the problem???  And how that got there to begin with??
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Jeffrey Kane - TechSoEasyPrincipal ConsultantCommented:
Is your router configured for Dynamic DNS?  Or is there a client running on your workstation?

Jeff
TechSoEasy
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Andrew AngellCo-Owner / DeveloperAuthor Commented:
ah, i think you just stumbled onto something.  but it's still very strange that it took this long to matter.  I used to have a dyndns.org dynamic ip account setup and my Linksys does have a dynamic dns confiration section that lets you include this so I set that up in there.  well, I changed from dyndns.org to no-ip.com awhile ago and I installed a client on my machine that runs as a windows service to update that.  I never disabled the router's dynamic dns setup until just now when you reminded me of that.

Thing is, that was MONTHS ago that I changed that.  And, I still don't know what got changed or how it got changed to make this happen...and now system restore was able to fix it..??

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Jeffrey Kane - TechSoEasyPrincipal ConsultantCommented:
Actually... the fact that you mentioned that you installed Trillian gave me the clue.  Both Trillian and the No-IP client were probably using the same port.  But since the No-IP client will automatically switch ports it did so when you installed Trillian... thus causing your problem.

Jeff
TechSoEasy
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Irwin SantosComputer Integration SpecialistCommented:
cool.thank you!
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