The unit is a P4 running Win XP and the regVac did a nice cleanup. However, it was switched over to Verizon DSL and worked great for a while. Suddenly the connection was lost and now it seems the lan card is not working. Device Manager shows lots of failures in the network section and I've tried to remove some or all and allow it to find and restore the hardware and drivers. Most all of the noted items cannot be removed as I get a message that they are neccesary to the boot. Is there a way to clear these so we can start fresh?