Hi Alice,
I'm Amr, an independent advisor.
Here is a simple solution you can try
Right-click on an empty space in your taskbar and select Task Manager from the context menu. If your Task Manager is in compact mode, make sure to click the More Details button.
Stay in the default Processes tab and click on Windows Explorer (explorer.exe) to select it.
Click on the now visible Restart button in the bottom-right of the window, and then wait for the Windows Explorer to restart.
Your taskbar, windows, and desktop may temporarily disappear — this is normal.
When everything is loaded back up, you’ll be able to test if the taskbar has been fixed.
I hope this is helpful. If you require any additional assistance, don't hesitate to respond to this.
This is a user-to-user support forum. We're users just like you helping other users to find solutions to their problems.
Best Regard
Amr