Welcome Onepieces,
Thank you for providing the screenshot and for listing the steps you've already tried.
From the image, the white pill-shaped bar appears directly above the taskbar icons and seems to appear only when the mouse moves near the Start area. Since it is visible only on your primary monitor, this may be related to a taskbar feature, a third-party utility that modifies the taskbar, or a display-specific UI overlay rather than the taskbar auto-hide setting itself.
Before suggesting more advanced troubleshooting, could you please confirm the following:
- Does the white bar still appear if you temporarily disconnect the second monitor and use only the primary monitor?
- Are you using any taskbar customization software such as StartAllBack, ExplorerPatcher, TranslucentTB, RoundedTB, TaskbarX, or similar tools?
- When the white bar is visible, can you press Win + Shift + S and take a screenshot? Does the white bar appear in the screenshot, or is it only visible when photographed with a camera?
In the meantime, please try these quick checks:
- Press Ctrl + Shift + Esc to open Task Manager.
- Under the Processes tab, look for any taskbar or desktop customization utilities and temporarily end them.
- Right-click the desktop and select Display settings
- Verify whether both monitors are using the same Scale setting (for example, 100% or 125%).
Looking forward to your update.