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Here are some troubleshooting tips for Windows 32 and 64 bit operating systems.

Dropdowns lists do not appear in Internet Explorer 7

This is caused by a known issue with Microsoft security update MS11-081 released on October 11, 2011. For more information about how to resolve this problem, click the following article number to view the article in the Microsoft Knowledge Base: 2628724  Some drop-down lists and combo boxes do not appear in Internet Explorer 7 after you install security update 2586448