Please open up the following link now:
Click "I forgot my password", and click Next.
Type in your @comcast.net email address and the captcha code shown, and click Next.
At the next screen, select "Email firstname.lastname@example.org" and click "Send Code".
A security code will be sent to your email account thereafter; please check your emails for that code, and type it in at the next screen, and click "Next".
You will be then be prompted to set a NEW password ***** your Microsoft/Windows account accordingly; once you have set it, you will be able to use the new password ***** logon to your Windows 10 computer itself.
If you need any further assistance with this issue, please be sure to reply back using the box below.
Otherwise, if you could kindly click on (and submit) one of the star buttons at the top of this page to rate my service, I'd greatly appreciate it. Thank you.