Can't type latin characters Mac x Windows

I access a Win XP machine using Chrome on Mac OS X High Sierra and I can't get special characters like á é ó â ê ô ã õ à í ú to work. I tried a few different keyboard layout setups, but nothing worked. I end up having to type a lot of stuff in a local notepad for further copy and paste, which is not convenient at all.

Am I missing anything? How can I make this work?

Thanks.

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Release Notes: Version 1.91, February 2015
Unattended Access (Beta) is live! Unattended Access, a feature requested by a lot of our customers is live now. Currently, it's in beta. You can add up to 100 computers per Technician subscription. They can also be accessed by your organization members. My Computers list in Zoho Assist home page will always display the online status of your unattended computers. You can rename the computers whenever you wish. Currently, Unattended Access can be configured only for Windows computers. Nevertheless,