If this does not solve the problem, please run Spybot-S&D and select Spybot-S&D → Immunize in the navigation bar on the left. Please click Undo. Then run Spybot – Search & Destroy and switch to the Advanced mode via the menu item Mode. Now select Tools → Resident from the navigation bar on the left. Please untick the checkbox in front of the Resident “SdHelper” (Internet Explorer bad download blocker) active.
But please note: Now the bad downloads will not be blocked any longer! Maybe you have to restart your computer now. Then try again to open your favourite pages. Do not forget to Immunize again after visiting that page.