Windows 7 64-bit. Does just fine.
It can still be ransomed.
1. Anything you want to keep should be backed up.
2. Don’t keep your backup drive connected to your computer.
3. Don’t click on links unless you know where they are going.
4. Don’t allow anything to be installed unless you know what is being installed.
5. Don’t run as administrator unless you are an expert.
6. Use a Virtual machine running Linux to do web-browsing