Mixed tungsten and daylight means you have two different color temperatures in the same scene, so the usual fix is to make them match or handle them separately.

Common options are:

1. Gel the daylight at the windows with warming gel so it matches the tungsten lighting.
2. Block the windows completely and use only the tungsten light.
3. Shoot near sunrise or sunset when daylight is warmer and closer to tungsten in color.
4. Change the interior bulbs to daylight-balanced bulbs so they match the window light.
5. If this is for a still photo, take two shots: one white-balanced for daylight and one for tungsten, then blend them in Photoshop using layers and soft masking.

In short, the goal is to get both light sources to the same color temperature, or combine separate exposures in post. The best choice depends on whether you can modify the windows, bulbs, or shooting time.