I have been given a laptop for my work and I have a few issues. I tried googling a bit but I have a hard time finding ''definitive'' answers to my questions. I hope one of my low end brother will be able to help me out. The laptop is a Sony vaio core 2 duo 2ghz running on 4 gig of ram and windows xp(64 bits). I mostly run openoffice and do a little internet browsing (Classroom usage). 1- Will I get any performance enhancement from upgrading the Windows OS to windows 7 or 8 ? 2- The blu-ray player does not work... whenever I try to play a bluray disk, I get an error message saying that my AACS Key library is expired. When I try to update it, I get this message: ''Server is unable to process your renewal request Sorry, the server is unable to process your renewal request. Please check that you have installed the latest patch for your version of WinDVD. You can find the appropriate link below. Once you complete the patch update, when you see the renewal message, please follow the instructions to update your AACS key. If the problem persists, or you still have questions, you may search the Knowledge Base in the Corel Support Center, or contact us. AACS Update Information in Corel Support.'' Of course, the knowledge base/support center didn't help much. I spent hours reading FAQ on Sony's website and trying different things without success in order to get te BD player to read disk. Help would be much appreciated !