Websites claiming to offer "ArcView 3.3 portable" or "cracked ArcView 3.3" are almost certainly dangerous. These files often:

: Modern 64-bit systems often cannot run the original 16-bit installer. Users often zip a pre-installed directory from an older XP machine and move it to a new PC.

For the best experience, run it inside a 32-bit Windows XP VM. Security and Legal Considerations

Running the software within a "Windows XP Mode" or a virtual machine (VM) using software like VirtualBox to maintain a compatible 32-bit environment. Free & Modern Alternatives

Uses its own scripting language (Avenue) for customization, which is completely different from the Python used in modern ArcGIS Pro.

I understand you're looking for content about ArcView GIS 3.3, but I need to address a few important points before providing a blog post.