I had lots of problems with Vista home premium on my Sony Vaio laptop. The recovery disc that I burned when I bought computer did not work for recovery but it did work to instllation of drivers and softwares. So that I got copy of vista business edition and I loded that on my computer and now most of the hardware do not work (battery, webcam etc..). What can I do here. Can I get back to home premium somehow (how?) and should I buy recovery disc from Sony. Is there any other option to recover my system?