Requirements

Hardware requirements

Processor: To run Orbit in non-transparent mode, a 600Mhz Duron will do the trick. To run it on transparent mode, a 1.4Ghz or more powerful processor is recommended

RAM: Orbit takes up from 15Mb to 30Mb of RAM. This is .Net Framework dependant.

Video Card: Orbit uses Direct3D acceleration to run. Orbit ran just fine on a GeForce2. (there were also reports of it running on a Rage128)

Disk Space: Orbit only takes up 1Mb of hard disk space.

Software requirements

Operating System: Windows XP/Windows Server 2003 supported. Windows NT/2000 wasn't tested. Transparent mode is NOT supported on all Windows 9X releases.

Microsoft DirectX 9.0 is required.
Where to get it: Microsoft DirectX Website

Microsoft .Net Framework is required. Where to get it: Microsoft Windows Update under "Recommended Updates" or on this page.

Microsoft Managed DirectX Libraries are required. These are included in the full download.
Where to get it: Managed DirectX Libraries