Installing Windows Server 2008 R2 involves the following steps:
1. Set the boot priority in BIOS to boot from the USB device with the Windows Server 2008 R2 installation files.
2. Follow the installation wizard, selecting either the Windows Server 2008 R2 Standard or Enterprise edition.
3. Partition the hard drive, allocating space for the system reserved partition, Windows installation partition, and additional data partition.
4. Complete the installation process, activating Windows, setting the administrator password, and initializing Windows components. When finished, the installation of Windows Server 2008 R2 is complete.