Hello Micky C! I'm Gunasekar and I'll be happy to help you with your question.
I understand that you are having trouble unlocking your account by resetting your Microsoft account Password.
There are a few things you can try if you're unable to reset your password after completing the CAPTCHA:
a. Try different browsers or Devices.
This issue can also be caused by your browser or devices. Try using a different browser or device to see if that resolves the issue.
b. Clear browsing History, Cache and Cookies.
To clear your browser's cache and cookies, go to settings and clear all the browsing History to check if that resolves the issue.
I hope this information helps. If you have any questions, please let me know and I will be happy to help you further.
Best regards,
Gunasekar N