> Virtual Box, is good for those that don't want to pay for stuff on local computers.
Be careful using it in corporate environments.
I used VirtualBox at home regularly - old games that won't run on modern operating systems anymore. Being free, it worked reasonably well for that.
At work I had to troubleshoot an issue with some software I couldn't side load on my usual machine as the installer complained of a newer version also installed, removing the newer version would've taken a long time and broke some of my existing projects. So I quickly installed VirtualBox, being 'free', to virtualise another copy of Windows for troubleshooting.
Long story short something else came up, I couldn't get to the troubleshooting stuff so I never got around to setting up a virtual machine after installing VirtualBox.
About a week later I got an email from one of our sysadmins asking whether I was still using VirtualBox. Querying why (out of curiosity, explaining my situation), apparently Oracle reached out, sniffing round for licensing fees, because they noticed I downloaded VirtualBox from their website. I didn't fill out any forms or gave Oracle my details. Work, I'm 95% sure, doesn't use Oracle products at all.
I promptly removed VirtualBox after that. On my personal machine too.