I had my computer taken to a shop because i got a virus. They formatted my hard drive and install windows XP like it used to be but it is telling me that it needs to be activated. Now my problem is that i cannot loose my info and i cannot take the PC back to them because it was in another country. My computer has a valid product key but seems not to be working. When i try to change it or activate windows, the computer does not open up any window or anything. Can anyone help me.? Thank you