I don't know if this helps but I have an hp pavilion ze5600 and I think it's windows Xp home edition
(I've posted this before but it has been so long since I've gotten a reply I thought the other one might be gone or something)
I was asked on the other post to
"Get Everest Home
Click + next to computer then summary, post everything from motherboard down, avoid including your details at the top"
Which I did but I haven't gotten any response back. I can re-post it again..