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win7 x64 Lenovo laptops dropping LAN connection

Posted on 2011-02-10
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Last Modified: 2012-05-11
I've had random Lenovo win 7 x64 laptops drop their LAN connection on our corp network (DHCP) the IP is lost and an ipconfi / renew does not fix the issues - only a reboot picks up a new IP and that last for about 20 min before it drops off again. First I thought symantec SEP 11.06 was the culprit; however, we have uninstalled it and still same behavior.

The only commonality is Lenovo laptops, win7 x64... all other machines are fine... any idea?
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Question by:DEFclub
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Expert Comment

by:vvlada
ID: 34866230
The problem could be Lenovo ThinkAdvantage Connection Manager - did you try to update this app with Lenovo System Update? Or you can try to deinstall it and test to see if this will solve the problem.
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by:DEFclub
ID: 34866350
Have you seen the ThinkAdvantage Connection Manager cause problems like this?
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vvlada earned 500 total points
ID: 34866373
Hi,

Yes, but it was always with some other software also. Usualy update helps, so please try Lenovo System Update first (you can just update Connection Manager).

Best regards,
Vladimir
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Author Comment

by:DEFclub
ID: 34875560
Its not the Connection Manager. I also, have an HP desktop Win x64 system doing it now too. So win7 x64 systems is the only thing these systems have in common.

symtoms:
Loss of IP, network stack hoses. cant restart services - have to reboot. Then happens again and again..
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Author Closing Comment

by:DEFclub
ID: 34903856
looks like it was the vpn software
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