Portable repacks frequently use mismatched DLL versions. Users report:
These issues can corrupt your Windows Registry permanently, requiring a full OS reinstall. Portable Catia V5 R21
If you do manage to find a file labeled "Catia V5 R21 Portable.7z" (usually 1.2–2.5 GB), what is actually inside? Portable repacks frequently use mismatched DLL versions
Unlike the standard installer, which writes thousands of entries to the Windows Registry, installs licensing services (DSLS), and places files in system directories, a portable version is essentially a snapshot of the software ready to execute. These issues can corrupt your Windows Registry permanently,
A: Technically yes, using the Windows To Go or VM methods described above. You are not violating the license if you use it only on machines you own or as a single-user license. But you cannot distribute that portable copy.