Hi,
Thank you for writing to Microsoft Community Forums.
I understand that a white line appears when watching videos in Microsoft Edge with white theme. I’ll certainly assist you with the issue.
1. Are you aware of any changes made to the computer?
2. What is the version of Microsoft Edge that is currently installed on your computer?
The first thing I would suggest you is to make sure that Microsoft Edge is updated. To do this, open Microsoft Edge click on Ellipsis (…) >> Settings >> About Microsoft Edge. This will automatically check for any update and install it.
We can also try resetting Microsoft Edge and check if that helps. To do this, refer the steps mentioned below:
- Open Microsoft Edge.
- Click on the three dots (…) from the right top corner.
- Select Settingsfrom the drop down and click on Resetsettings.
- Select Restore settings to their default values.
- Relaunch Edge and check.
**Disclaimer:**This will reset your startup page, new tab page, search engine, and pinned tabs. It will also disable all extensions and clear temporary data like cookies. You favorites, history and saved passwords will not be cleared.
Let us know how it goes.
Regards,
Nikhar Khare
Microsoft Community - Moderator