Hi, I have a Lenovo ThinkPad x200s running Windows 7 64-bit. In the last few weeks I have had a new problem arise that is driving me nuts - after a short while, it will drop its network/connection and the only way I seem to be able to get it back is to reboot.
I'm really good with software, but definitely scratch and sniff when it comes to system and networking issues.
Here are the symptoms:
This will happen using either the wireless or wired connection to my DSL router.
I have a desktop pluged into the same router which will be functioning with no problem.
When the connection drops, the signal will still show as connected (using the Lenovo network connections manager, it will still show green). A survey of sites will show all active wireless routers in the area including my neighbours.
When the connection drops, I cannot reconnect it with any of the following methods:
*Repairing via Network Connections
*Using my network adapter and running the troubleshooter
*Ipconfig /release /renew (I get a DHCP timeout error)
*I have tried assigning a static internal IP with no luck (and it shouldn't have any trouble).
When the connection drops, I am unable to ping any external connections, the router (192.168.2.1) or 188.8.131.52.
I have added a TCP/UDP entry to my firewall to allow communications to 65 and/or 67 I think (would have to go look it up) but will remove since that doesn't seem to have made a difference.
When I type in an address, I will variously get timeout or page not found errors, or in IE sometimes it will show http:///
with three slashes. I actively use Firefox, Chrome, and IE, and it is definitely not a browser issue.
Known IPs -
problem laptop 192.168.2.5
I recently installed a cellular modem, but coverage near me stinks, so I deinstalled it. I believe this is when Teredo tunnelling appeared in my system (I don't recall seeing it before) along with TCP/IPv6. I've disabled the tunnelling everywhere I could find it, but that hasn't made a difference.
It feels like a configuration/setting/conf
lict issue, but I've had no success so far. Any suggestions gratefully accepted. Thanks!