If you like to install, we highly recommended taking a snapshot of the VM before proceeding. This enables the virtual machine to have 32 bit True colors and enough pixel resolutions inside the VM. You will find plenty of working keys on the internet. It should work on other Operating Systems such as Linux and macOS as long as you have the VirtualBox and correctly configured virtual machine settings.
We created this image from Windows 10 host computer. You must use the right Ctrl key to release the cursor from VM. Note: As VirtualBox does not support guest additions on this older version of Windows OS, we may not able to use other enhanced features. It is just a 64MB zipped file you can easily download, import and use it on Oracle VirtualBox. To save your time which involves in downloading the CD/ISO file and following installation steps ( by the way, the installation time takes more than the Windows 10), here is the pre-installed VirtualBox image of Windows 98 SE.