I need help installing acrobat professional 8.1 which I originally purchased and as an upgrade in 2007 on my laptop after another laptop crashed. This is not the first time, however Wayne in the Philippines and his team said they could not help without the serial number before the upgrade. I purchased both versions online at the Adobe store but the original serial number is not there. Last year I had the same problem and another Adobe team was able to help me. What can I do not short of leaving Adobe and going to another PDF Conversion provider?