Officially, no. WinISO does not give away permanent free license keys. However, they occasionally run promotions or contests where winners receive a license. But these are limited and require participation, not a search engine query.
The developer, WinISO Computing, has officially released WinISO 5.3 as a free product. It is titled "Free WinISO Maker" and serves as a fully functional ISO editor, converter, and creator for older Windows systems. Registration Name: WinISO 5.3 Code winiso free license key
Using a free license key obtained from unofficial sources can pose risks: Officially, no