Only way I see is to open your Control Panel icon
Click on the Sound link to see what type of speakers your using. Can click on properties and check balance there - click levels and first item on top - click balance
Can then search for the speaker link in the same panel - Mine says Realtek HD audio manager. Once you click on the speakers. You can adjust the L-R position and volume there also just to make sure both match up
All the windows will stay open to check and see that all are the same settings
DON