When ordering a dedicated server or VPS with Windows Server operating system, be sure to consider the hardware requirements. It is recommended to use the most up-to-date version, i.e. Windows Server 2019. In some cases, you have to use older versions. For example, Windows Server 2003 is used to support Windows XP-based systems and networks. Therefore, the choice of a particular version will depend on the environment with which the server will interact. The old software can work efficiently and perform all the necessary functions. Software is rarely replaced at industrial enterprises, in government agencies. To work with old software, Windows Server 2008 R2, Windows Server 2016 can be used. You can choose an operating system when ordering a VPS or a dedicated server. In order not to reinstall the system in the future, it is recommended to test your project and its compatibility with the selected OS version on the local computer in advance.