I have Windows Vista Home Premium service pack 1 installed on a Dell Inspiron 1521

When I look in the device manager, and show hidden devices, I see many instances of 6to4 adapter.
If I uninstall all 6to4 adapters, then reboot the computer, one 6to4 adapter is installed. If I reboot again another instance of 6to4 adapter is installed.
It appears that a 6to4 adapter is installed every time that I reboot.

The drivers all appear to function. No warnings appear.

My intuition tells me that this is not normal and should not happen.

Also, I have noticed that when I have multiple 6to4 drivers listed in the device manager then I unplug the Ethernet cable, one 6to4 driver disappears but the rest remain. When I re-plug in the Ethernet cable, a new 6to4 driver installs. If I uninstall all 6to4 drivers then unplug Ethernet cable then re-plug the cable a new 6to4 driver appears.

Is the Broadcom 440x 10/100 Integrated Controller the problem? I looked that the Broadcom website. It is very confusing to me. I am not even certain if that is the driver that is causing the problem. I also downloaded the Broadcom 440x 10/100 Integrated Controller Diagnostics Utility. Ran it. No problems were found.

 

Any help is appreciated,

 

P_Mash