I have Windows 8 64-bit and just downloaded Adobe Digital Editions 184.108.40.206765 to read an e-book. It's a book from a local library and the e-books are provided by www.elib.se . ADE displays the first page properly but the problem arises when i change page, ADE doesn't display the page but changes the pagenumber, the page is displayed only when I resize the window.
This is a bug that hits quite a few people (but not all) apparently randomly on ADE2.0.
There are lots of bugs in ADE2.0 (and 2.0.1). Try replacing ADE2.0 with the older but more reliable v1.7.2.
(You can have them both installed at once if you like.)
Version 1.7.2, it is a little difficult to find, available on Adobe site for Windows and for Mac.
The forum software is sometimes corrupting the link above. There shouldn't be a blank in 'editio ns.html'. The following redirects to the same page: http://tinyurl.com/diged172
Some people have found ADE trying to upgrade automatically.
It appears (not 100% sure) that if you install ADE2.0 as a new install (not as an upgrade) that your 1.7.2 will continue to run.
Probably best to say no if 2.0.x installation asks if you want to migrate your library.