Unable to login to Yahoo Mail

SlackerITGuy said:

Sorry for the MASSIVE delay but, my old man was on a business trip for the past few weeks (and naturally he had his laptop with him).

So, I stopped by his house late last night and tried a few more things:

• A complete Windows re-install (It's an HP, so I used the recovery partition)
• Tried different browsers (Chrome, Safari, etc)
• Different AV setups

And nothing.

Same problem persists, which is baffling to say the least. The weird thing is, he's able to sign in from his desktop without any issues, but with his laptop, it sometimes works, and sometimes it doesn't.

Did you try going directly to the Yahoo home page, then log in to his mail there, I'd start there first