The problem may because caused by Spybot's "SDHelper" blocking access to advertisement URLs. Try the following:
Go into Internet Explorer > Tools > select "Spybot – Search Destroy Configuration" > then in the "Spybot-S&D - Configuration" window in the "Settings" tab under "When encountering bad things" there are three options:
- Block all pages silently
- Display dialog when blocking
- Ask for blocking confirmation
Select "Ask for blocking confirmation" and click "OK".
Exit Internet Explorer and restart it.
When you encounter a URL that would ordinarily just be blocked in "Block all pages silently" mode, Spybot's "SDHelper" will issue a "Spybot-S&D Bad URL Blocker" dialog. The dialog allows you to either "Allow" or "Deny" the access and also allows you to select among the following options:
- Ask me again next time
- Remember for this session
- Always react this way
Try accessing one of the pages that seems as if it never completes loading. If you encounter a "Spybot-S&D Bad URL Blocker" dialog while accessing that page, select "Always react this way" and then "Allow" the access. See if the page finishes loading.