Hi All, The problem is related to the presence of an abnormal number of network devices (such network devices there are not on my laptop with Windows 7). Opening the Device Manager and highlight the hidden devices (open View and then select Show Hidden Device), appeared about two hundred network cards calls Microsoft Device 6to4 Is there any quick solution to delete 6to4 network card through registry.......? i have also tried devcon.exe but it is time consumimg process. Regards, chinmayCheer's Chinmay.

If you could attach a image showing the device manager as what you claim above, that would helps. And what is the exact make and model of the laptop? As far as i could tell, there are only 13 network device as in wan miniport, ras async adapter, microsoft isatap adapter etc under network adapter which is pretty normal

Daniel, thanks for reply, my device manager look like attched image. or your reply, the devices manager screen look like attched image.Cheer's Chinmay.

Hi, Please read the following KB: A new Microsoft 6to4 adapter is unexpectedly created after you restart Windows 7 or Windows Server 2008 R2 Best Regards DalePlease remember to click Mark as Answer on the post that helps you, and to click Unmark as Answer if a marked post does not actually answer your question. This can be beneficial to other community members reading the thread.