XP Pro SP1 Prob with NIC disappearing

[SiHH]

As the title says..

Randomly user cant logon to network and in device manager the NIC has disappeared.

Tried reinstalling but no joy.

Anyone seens this ?

 

[SiHH]

Thought of that but put in a SP1 hard disk from identical pc and worked fine.

Strange thing is put the old drive back in and now that is working !

Very odd.