The NAVCANCEL is a sign that some Norton Antivirus is involved in the headache too. But I don't read about this in your posting.
http://reviews.cnet.com/5208-6122-0.html?forumID=44&threadID=40785&messageID=478360&tag= is a total endrun to wipe IE and reinstall it.
when i log on to AOL 9.0, i can get as far as the welcome screen and if i try to access any page beyond that the page title bar says "no page to display" and this displays in the address bar "res://C:\WINDOWS\SYSTEM\SHDOCLC.DLL/navcancl.htm" infront of the address im trying to get to.
I contacted AOL who informed me that it was a problem with my internet explorer. So i tried to repair it and it told me that it was unrepairable, to run setup again so i did. and it still is doing the same thing.