Dell precision T3600 & T3630 series hate YHAOO. Please help

I own many Dell desktops and laptops.

The Precision T3600 and T3630 are very good. But for some reason, they all hate Yahoo.

yahoo.com is always slow to display and the page layout is so cluttered that it barely displays well for me, and Yahoo email is nearly unusable. Other sites have no problem at all.

I tried Firefox, Edge, Google Chrome and they all had the same confusing results and difficulties.

I even reinstalled Windows 10 Pro and 11 Pro but the problem persists. Therefore, it should not be caused by a virus.

My other computers have no issues, so it's not an issue with my network.

Can anyone help me solve this problem?