Win7 Help w/ no connecivity

[tdyoung1958]

Toshiba Satallite issue,

Can't conect to network, getting a error message that says another computer connected with same IP address contact admin. I'm admin, no other computer connected with the same IP address.

Started about yesterday days ago. Desktop icons got real small and CPU is spiking to 100% from way down, sometimes running at 100% for a while.

sounds like it's fixing to die, but under warrenty,
did a full restore after saving anything worth saving
other computer has no issue with connecting

any words of wisdom / help

[Ricky-Ray]

I'm assuming your running a router since you said the other computer is working fine.

By chance maybe the other computer is using the same IP as the laptop is trying to get?

Are you sure both computers are set to obtain IP automatically and not set for static IP?

Have you tried rebooting the router?

Have you looked at the router logs and see if there were any other devices that's connected to your network besides your authorized devices?

Have you tried deleting and recreating the wireless network in win 7?

[the86d]

IF you are running WEP (not WPA, or WPA2) there could be someone that cracked your wireless (it takes <5 minutes to crack WEP), and is leeching Internet from your pipe. If you are using the default encryption for your router (code printed on the bottom of your router), this is probably the case. Anyone who knows Linux at all can crack WEP...

I suggest that you run WPA, or WPA2. If you need help... ask any computer person you know that doesn't sport a Mac to help, and buy them lunch for the assist.

One way to not be detected leeching is to use a static IP, and this is probably the case, they just chose the wrong IP within your DHCP scope and you got lucky to detect it.

[tdyoung1958]

I suggest that you run WPA, or WPA2. If you need help... ask any computer person you know that doesn't sport a Mac to help, and buy them lunch for the assist.

WPA2

I'm assuming your running a router since you said the other computer is working fine.

By chance maybe the other computer is using the same IP as the laptop is trying to get?

Are you sure both computers are set to obtain IP automatically and not set for static IP?

Have you tried rebooting the router?

Have you looked at the router logs and see if there were any other devices that's connected to your network besides your authorized devices?

Have you tried deleting and recreating the wireless network in win 7?

Yes, Belkin Router, don't know if the other one is trying the same

Yes, obtain automatic IP

Yes, rebooted router and modem

No one else is connected

Don't know how to delete and recreate wireless networks in Win7

[SouperMan]

Did you already try a ipconfig /release and renew already? See if you need to update the firmware on the router.

[the86d]

Yes, Belkin Router, don't know if the other one is trying the same

You running two routers both serving DHCP?
-----------------------------------------------
Sometimes people forget if they set a static device on the network...

Are you running the Windows firewall, or an AV that has Network Threat Protection/Firewall all inclusive? They disabling those. I have seen Symantec AVs disable all networking before, and nobody knows why. See if you can disable those, and if all else fails, uninstall AV?

Use a wired computer, reboot router, don't have any wireles devices on, and check the DHCP/Connections on the router to see if you can still ping that IP addy.

Could a neighbor have your WPA2 key and could they be running a static IP nextdoor leaching?

[Nose Nuggets]

"Started about yesterday days ago. Desktop icons got real small and CPU is spiking to 100% from way down, sometimes running at 100% for a while."


sounds like malware, not a networking issue.

[JOEKILLA]

"Started about yesterday days ago. Desktop icons got real small and CPU is spiking to 100% from way down, sometimes running at 100% for a while."


sounds like malware, not a networking issue.

+1

Download combofix and run it.

I'd rather re-install the OS with any malware/virus infection.

[JDay]

Make sure you don't have any systems setup on the network that are using a static IP (use reserved DHCP if you need a static) since the DHCP server will not know if that IP is in use and will assign it to a client. It is also possible someone cracked the WPS PIN code (takes about 10 hours, gives up your WPA/WPA2 key) and is using a static IP on your network, disable WPS to prevent this (although that doesn't always prevent this).

http://lifehacker.com/5873407/how-to-crack-a-wi+fi-networks-wpa-password-with-reaver

[tdyoung1958]

got it fixed, the AVG free antiviris and firefox just doesn't cut it.

switch over to MS Security Essentials, all is well and GF is happy