I bought an emachine refurb on ebay. I loaded my Sony video software (PMB) and all was good. When I shut the PC down, it ran updates. Afterwards when I opened PMB and went to edit a video (any video) it begins to open the edit window and then I get a message 'Unknown error'. I did a restore and took it back to before the updates ran. It worked fine. So I set the updates for me to run manually. When I shut the PC down it ran the updates anyway and I'm back to square one. Is anyone aware of conflicts between 7 and Sony's PMB?