I had a hard drive failure, and got the PC back this weekend. I downloaded and installed ADE, but can't get it to do much. It downloaded one library book, and then stopped loaded subsequent ebooks. When I went to click on authorize the PC, I was not able to do so. I think that through the years, I have exceeded the six devices authorized, between new PCs and IPADs. I can provide my Adobe ID being used, via an email from Adobe.