Windows key inoperative dv7-4285 windows 7 - 64 bit. only key not working

Windows key inoperative dv7-4285 Windows 7 - 64 bit. The Windows key is the only key not working.

Thanks for the information,
I have a couple of suggestions that may help with this issue. My first suggestion would be to uninstall and reinstall the drivers for the keyboard.
Follow these steps to do that:
Click the "Start Menu"
Type "Device" in the search box under all programs
Select "Device Manager"
Click "Keyboards"
Remove all devices under keyboards by right clicking and selecting" uninstall" on each device
Restart the computer
How long has the button not been working?
Are there any other keys not working or producing the wrong character?
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