ok,

if you did not try this,
open IE, and go to internet options, on the advanced tab i think, there is a reset IE to defaults. also open up the add-on's and select "all add-ons" from the drop down, disable everything (might want to take a screen shot of what was enabled for later when you undo it). restart IE and giver her another try.

You did look at your time settings right?
Step 1: Right click on your time on the Windows Taskbar and select "Adjust date/time".
Step 2: Click on "Internet Time"
Step 3: Click on "change settings" and make sure it's set to "time.windows.com" and then press "Update Now".
Step 4: Manually adjust the date of your calendar to today's date and adjust the time to todays time.

good luck, hope one of these works...