Appreciate your efforts.
My solution to stop worrying is easy and anyone can do it - any trojan/virus for windows cannot work in this enviroment:
(1) Simply follow these instructions to install windows subsystem 2 with Ubuntu - So you now have a Linux running under windows on your laptop which you can interact with.
(2) Install Java and Portfolio-Performance.
sudo apt update
sudo apt install openjdk-21-jdk
wget https://github.com/buchen/portfolio/releases/download/0.69.0/PortfolioPerformance-0.69.0-linux.gtk.x86_64.tar.gz
tar -xvf PortfolioPerformance-0.69.0-linux.gtk.x86_64.tar.gz
echo — rename this directory to portfolio to make it easy
sudo mv -fv PortfolioPerformance-0.69.0-linux.gtk.x86_64 portfolio
cd portfolio
echo – run Portfolio-performance
./PortfolioPerformance
You now hopefully have a working program - but running in linux not directly in windows - you can access your window files from the linux machine in windows via /mnt in the root directory.
And your completely safe from any trojan etc…