Hi ,my sisters 1 year old hp pavillion a6623 ,just packed in ,it seems the seagate 500gb HD has faulty firmware . well they sent out a replacement WD drive and a set of 3 recovery discs however as the new drive is empty .(no OS) how do I go about this ,I tried booting from the 1st recovery disk but after a short spell when windows loading files shows .it gives an error (In Dutch) and will go no further . any way to modify a full windows Vista disc to mimic an HP oem one . so I can install and would this work as far as activation is concerned . there does not seem to be a bios available for this main board.