Continue booting the computer 3 or 4 more times; a menu should appear.
If the menu appears (DO NOT TRY TO BOOT IT AGAIN), select Troubleshoot> Advanced options > Startup Repair
Wait until the startup repair finishes. If it fails, continue to the next step:
Click on Advanced options, click Command Prompt, then run diskpart then list volume. Look for the partition that contains Windows (or the largest NTFS partition). Once identified, note the symbol (example C:), run exit, then type in C: (Replace C: with your actual drive symbol that has your true Windows installation in it), then run:
bootrec /fixmbr
bootrec /fixboot
bootrec /scanos
bootrec /rebuildbcd
Hope this helps!
Best regards,
Nanta