Windows Update

Greetings . I have desktop with Windows 11 64bit . I usually check my updates history daily to make sure KB2267602 definition updates are downloading . I have not received that auto update since 10/6 .. That version was 1.459.576.0 .. I can go in to Windows Security under Virus/Threat Protection and download them manually okay ..  I would appreciate if someone could give me step by step instructions on what might be wrong and how to correct ..  I tried the Update Troubleshooter and informed me it could not run the program ..   Thank you in advance for any assistance ...