I have a dell 4500 . I thought I would be nice and give my daughter my cdrw drive because she needs it more than me. I pulled it out and installed it in her comp and all was good. When I booted up my dell it gave me a message saying because of recent hardware changes I must activate windows within 3 days. I thought no problem. I go online and it wont work and now I have to call MS. Then I call and get questioned by a MS employee that could barely speak english. He gave me a new install number and told me if I reinstall a cdrw later I will have to go through this whole process again. They have taken anti- piracy too far. I have three legal rigs and this is stupid. Maybe I should buy a mac !