I have  trying everything under the sun to get my P8 to display the  Library
window . After 3 weeks of emails  Working with SM tech support  we finally narrowed the
problem to  Norton AntiVirus program called Norton 360. I contacted Norton they verified
that the problem was due to **Norton 360 is not compatible with MSIE 8.  **I had just installed
MSIE 8 to be compatible with P8 and Adobe Flash. Norton upgraded me for free and that fixed the problem....with P8.
I hope this info will be of help to somone else who may be experiencing the same problem.

Added comment:
I think that if P8 is so reliant on outside applications to function, then
we could to be in for a world of future problems when updates and patches are installed
to these applications.  I wish SM would have  kept all the code within the application itself
instead of relying on on these outside "hooks". This is one of the conseqences of doing
it....