Might check this also.

Unchecking "Check for publisher's certifcate revocation" in IE controls

One more thing to check

Select START/RUN, type MSCONFIG in the 'Open' box and press enter. When SCU
opens, click the 'System.ini' tab. Next expand the boot entry at the top of
the list. Look at the line shell=Explorer.exe...... If the line shows as
shell=Explorer.exe openme.exe, highlight the entry and click the 'Edit' button.
Now edit the line to read shell=Explorer.exe, click 'Apply' then 'OK' and
reboot when prompted.

Good info