Question

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pc wont stay connected to internet

By SystemCheck ·
i have a pc xp pro sp3, keeps claiming that there is an ip conflict with another computer on the network, but dont see no conflicts anywhere, no spyware, adware, virus. The internet connection appears to intermittent, i even tried a winsock fix, nothing. Does anyone know what the problem may be?

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Is this a stand-alone PC?

by Ron K. In reply to pc wont stay connected to ...

If not, did you physically check the IP addresses of all of the other PCs on the network?<br>
Alternatively, on the computer in question, go to Control Panel | Network Connections | LAN or High Speed Internet (Local area connection) | Properties | Internet Protocol TCP/IP | Properties and choose to Obtain an IP address automatically.

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yes

by SystemCheck In reply to Is this a stand-alone PC?

i have checked all ip of other desktops none are the same, i even did a static ip of an ip not in use still get an error for ip conflict after a few minutes of use.

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Description of the problem and possible solutions.

by Ron K. In reply to yes

http://www.online-tech-tips.com/computer-tips/ip-address-already-in-use/ <br>
Right-click your network connection icon and choose repair.

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dhcp

by SystemCheck In reply to Description of the proble ...

we are currently using dhcp configuration, tried using the repair, worked for a little bit then same error, according to our server, not other object is using that ip though

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so you did an ipconfig/release then ipconfig/renew?

by Screen Gems In reply to dhcp

and you still get an address conflict?

I'd check leases in DHCP. If the address your using is the same as another on the network, it would show up in leased or reserved.

If not, it's possible that address is a rogue address and you have a rogue machine on the network that's using a static address, but it's unlikely if you took measures to secure your network from rogue machines.

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rogue machine

by SystemCheck In reply to so you did an ipconfig/re ...

you mean like some guest or possible another employee of that sort with like a laptop or something using that ip (with static or dhcp) causing it not to show up on the server list. is it possible to have a conflict from multiple network adapters, we have 6 currently?

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it's possible yes

by Screen Gems In reply to rogue machine

as a rogue machine will use a static address and it's not in DHCP reservations and it does not get the address from DHCP therefore does not show up in leases.

if you have multiple network adapters, and they use static addresses, you must account for them in DHCP by listing them as reserved so DHCP doesn't dole them out.

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rogue machine

by SystemCheck In reply to rogue machine

ok checked the adapters, all of their ip are listed under the ip reserve

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so again on the machine that gets the message

by Screen Gems In reply to rogue machine

is their address assigned by DHCP? if so
from the command prompt type:

ipconfig/release

this releases the assigned ip address from DHCP.

then at the command prompt type:

ipconfig/renew

this requests an address from DHCP and DHCP will assign the machine an address from it's pool [provided the machine doesn't have a static address].

what were the results?

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so you did an ipconfig/release then ipconfig/renew?

by SystemCheck In reply to so you did an ipconfig/re ...

i did the ipconfig/renew, the dhcp gave me same ip, check the leases and the server the server appears to be fine. redid a static ip with a known unused ip, got same result: ip conflict, perhaps scans were inconclusive, running a microsoft scan now, so far one infected file has been located. scan is halfway complete.

after pc reboots though it appears it can connect to the net just fine, but for a short period of time (say 5 min). will report back after scan is complete.

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