You are using an out of date browser. It may not display this or other websites correctly.
You should upgrade or use an
alternative browser.
Give this a try.
Click "Start" and click "Run."
Type "services.msc" and press "Enter."
Double click the entry for "Windows Audio."
Select "Automatic" from the drop down menu and press the "Start" button. This will restart the service, reinstalling your mixers.