I haven't had ANY problems with Sony's software since I got it in Dec. of last year. The reader came with the software loaded, so I didn't bother reloading it. I did one synch & realized I didn't like it and have never used it again.
I have no problems loading my books onto my reader from the file where I keep all of my books, nor did I have any trouble registering my pc or reader with ADE.
I'm sorry so many of you have problems, but some of us are doing just fine with it.