Internet Explorer 9 was working now isn't?

Hello,

We updated to Internet Explorer 9 on a Win. 7 PC 2 weeks ago and our dashboard loaded fine, until yesterday. This is baffling me as to why it would work and then stop. It is giving us the “out of date” browser warning and it is making the dashboard all 1 col. on the right and the screen is white. I’ve had this screen on a Win. XP using Internet Explorer 8, but I know IE8 on a XP is no longer compatible with the 3.2.1 WP. Do you think if I uninstalled IE 9 and reinstalled that would help??

Thanks,
HR