I gave up on the Sony software ver3. Which if you downloaded from their site I assume you are using. It works perfectly on my netbook running windows XP but nothing I did could get it to work on Vista laptop. So with help from some of the great mobile read members, I changed to Ver2.5. It works perfectly. When I first got the Ver3 and it wouldn't install on my vista machine I went to the Sony Style store where I purchased my PRS-300. I asked one of the salesmen, who I know from many previous transactions, if he had heard of any problems with the Ver3 library software. He told me there weren't any that he knew off. Obviously not a member of mobile read.
Regards, Daryl
Link to Ver 2.5 here
https://www.mobileread.com/forums/sho...38&postcount=1