I understand that you are unable to open your sympatico email in Internet explorer 9, after you download security updates.
1.Have you made any changes to the computer?
2.Did you receive any error message?
3.Does this issue occur only with the particular application?
I would suggest you to perform clean not and check.
I would suggest you to perform clean boot and check.
Place the computer in a clean boot state and then check if it helps. You can start Windows by using a minimal set of drivers and startup programs. This kind of startup is known as a "clean boot." A clean boot helps eliminate software conflicts.
How to troubleshoot a problem by performing a clean boot in Windows Vista or in Windows 7
Reset Internet Explorer disclaimer: Please note that running Reset Internet Explorer Settings will reset all user-defined settings including those set by installed extensions, toolbars and other add-ons to IE Defaults. This includes all Security, Privacy and Zone settings. Also
this will clear browsing history, delete all temporary Internet Files, cookies, form data and especially all stored passwords.
You experience slow performance in Internet Explorer 9