I'm facing a strange issue whereby ALL the browsers on my home computer (Chrome, Firefox, Safari, IE, Opera) are defaulting to Arial Black. The font settings are normal - Times New Roman, Arial, Courier etc. - but that doesn't seem to be making a difference.
This is how the web should look:
And this is how it looks on my computer:
I thought it might be a rogue extension, but then how would this affect both Chrome and Firefox. I have NO add-ons installed in Firefox. And what about Safari and IE?
I have a similar problem with my work computer, but the font there isn't Arial Black. I don't know what font it is, but it's not the regular Arial.
Where can I start looking?
I am running Windows 7 Ultimate x64 on an mid-2011 iMac. This problem does not occur when I am in Mac OS X on the same computer.