Use the direct links to download Red Hat Linux iso for VirtualBox. Use it to install Red Hat on Virtual Box as a lab environment.
Best Virtualization tool? Use the direct link to download VirtualBox for Windows 10 from Oracles server for free.
Want to download Windows 7 ISO file? Here is the direct link to download Windows 7 ISO file for VirtualBox and VMWare; can be used on PC & laptops too.
Want to use Windows XP without any risk or restriction? Here is how to install windows XP (virtual machine) on windows 10.