Storage

Hi,
In my pc (Win xp sp2)I got installed all drivers and was working fine. After some( not sure which are) windows updates, some problem with lan card started. so i unistalled the lan card from device manager. when i reinstalled the driver from the original mbd manufacturer cd, it shows the driver is not digitally singed, are u sure to continue the installation. The same driver installed in another pc of same config and OS.

I continued the installation by disabling the dirver signing options.

What goes wrong on my pc ?
Also i am not able to uninstall the IE8 installed through automatic update. system restore is a way to solve this. is there is another way to uninstall iE8 ?
is both problems are co related...

Any commend on this is appreciated.