Hi everyone, I have an Advent 6441 Laptop with Vista Home Premium pre-installed. I have read that it is possible to upgrade my vista to ultimate using the OEM cert and SLP keys?? Could someone please either write a step - by - step instruction as to how i do this or point me in the right direction if there is already a thread explaining this. I am so confused I have been searching through all the threads and cant find one. Cheers.