Hi! That usually happens when there are multiple boot entries saved in your system’s Boot Configuration Data (BCD), or if Windows didn’t cleanly update it after an installation/upgrade. You can stop Windows Boot Manager from appearing at startup in a couple of ways:
- Press Win + R, type msconfig, and press Enter.
- Go to the Boot tab.
- If you see more than one Windows entry, select the one you actually use.
- Click Set as default.
- Highlight any other unwanted entries and click Delete.
- At the bottom, set Timeout to 0 (or at least 3 seconds if you want a fallback).
- Apply and restart.