: DirectX 9.0-compatible with at least 32MB of VRAM. Screen Resolution : 1024x768 or higher.
: The last version to support Windows XP Service Pack 2 . System Requirements for Windows XP Itunes Windows Xp 32 Bit
To run these versions effectively on an older machine, Apple specifies the following minimum hardware: : 1GHz Intel or AMD processor with SSE2 support. RAM : 512MB (1GB recommended for playing HD video). : DirectX 9
: Often cited as the last version with full functionality before legacy support was adjusted. Itunes Windows Xp 32 Bit
: Recommended for those needing iOS 9 device support.
You can find the official installers for the most compatible versions on the Apple Support site or through the Apple Support Community: