Hi,
It is an FPS or Metrics Overlay. Please try the following solutions below to turn it off.
- Xbox Game Bar
- Press the Win Key + G. Click the Performance icon and then check if it was not pinned.
- If you have AMD Software: Adrenalin Edition
- CTRL + SHIFT + O for Toggle Performance Overlay. If it doesn't work, please refer to this page for alternative solutions.
- If you have NVIDIA GeForce Experience
- ALT + R or ALT + Z for Performance Overlay.
- If you have Steam or other platforms or apps who had a Performance measure feature, please disable the performance overlay.
If you require further assistance, please don't hesitate to let me know.
Stay Safe!