Great OS - runs fine on an old XP machine of mine - In fact - it runs quicker than XP does!
Machine Spec
System
--------------------------------------------------------------------------------
Manufacturer Compaq
Model Evo D500
Total amount of system memory 512 MB RAM
System type 32-bit operating system
Number of processor cores 1 @1800
64-bit capable No
Storage
--------------------------------------------------------------------------------
Total size of hard disk(s) 75 GB
Disk partition (C 2 GB Free (11 GB Total)
Disk partition (D 42 GB Free (63 GB Total)
Media drive (E CD/DVD
Graphics
--------------------------------------------------------------------------------
Display adapter type NVIDIA GeForce 6200 (Microsoft Corporation - WDDM)
Total available graphics memory 320 MB
Dedicated graphics memory 256 MB
Dedicated system memory 0 MB
Shared system memory 64 MB
Display adapter driver version 7.15.11.7816
Primary monitor resolution 1024x768
DirectX version DirectX 9.0 or better
Network
--------------------------------------------------------------------------------
Network Adapter Intel(R) PRO/100 Network Connection
More info
http://www.winsupersite.com/faq/windows_7.asp