Probably not. What version of Win 7? Have you checked for viruses, malware, etc? When did this start? What were you doing just before it started? Have you tried a System restore from before it started? Do you have a System Image from before it started? What drop down menus? All or just some apps affected?
Lots more info needed to even start trying to help.
Since you said anybody! I seem to feel for some reason those menus may depend on how the site was designed. You might try using the compatibility mode to see if they work, and if not that, perhaps a pop-up blocker, or maybe Java or some other scripting language might need to be installed or allowed, but not really sure.