1933
Hell freezes over, MS Paint adds support for layers and PNG transparency
(arstechnica.com)
This is a most excellent place for technology news and articles.
I recommend Krita, it's free and open source, and very good at making digital art of any kind.
The commenter you replied to literally wrote the computers are locked down, ie no way to install any new software.
https://portableapps.com/apps/graphics_pictures/krita-portable
There's a portable version that might work.
I've never experienced this, I've only experienced that you cannot do anything you need an admin for, maybe the control panel and settings app were removed from sight.
Do you use krita for vector graphics?