HOTFIX: The CPU usage on the computer may increase to 100 percent when you try to print an HTML page in IE7
In Windows Internet Explorer 7, you try to print an HTML page that contains a table. When you do this, the HTML page is not printed successfully. Additionally, the CPU usage on the computer may increase to 100 percent.
When you click Print Preview to display a preview of the HTML page, Internet Explorer 7 may lay out the HTML page multiple times. Additionally, the preview of the HTML page is not displayed correctly.
This problem is more likely to occur if the overflow-y attribute is applied to the HTML page.
Source: http://support.microsoft.com/default.aspx/kb/933264