I had a PC running XP Pro on which the motherboard died. I installed the IDE HDD from that PC into my new Vista PC as a slave drive (changed the jumper). The new PC does not show the slave drive at all. Based on information from here and elsewhere, (because I had to connect it to the DVD/RW IDE cable), I went into BIOS to set this HDD as slave to the DVD. I set it to auto detect - but nothing changes. I am one of those that knows just enough to get myself in trouble occasionally. IF it comes down to it, I will try putting it in an external USB enclosure and see if that will work - but I want to make it work as the slave drive if at all possible. Any ideas? Thanks in advance.