Windows 10: Deuxcreeks
Using Yahoo mail on my Samsung phone and Acer tablet without any problems. On my Acer laptop which uses Windows 10, the Yahoo mail started giving me security messages and not loading in my mail even though I was getting it on my other two devices. I tried many suggested solutions without success. Finally removed the email account and then went to Yahoo.com, sent a shortcut to my desktop and then signed into my yahoo mail. Voila, my mail was there and no more problems!
Glad you got it working but I have a tip: use the Subject line to identify your problem such as E-Mail, Yahoo issues, etc., and you should get appropriate responses. Your User Name is already visible on your post.