This 
Call of Duty® 
2 update is recommended for Windows 2000/XP users with Intel 
Hyper-Threading Technology (HT Technology) enabled processors, multiple 
processors, or systems with a dual core processor. This update will bring any 
supported version of Call of Duty 2 up 
to version 1.01. This upgrade will not affect pure server, and will not affect 
your ability to join or host multiplayer games with version 1.0 
players.
 
Infinity Ward worked closely with Intel to improve Call of Duty 2 
performance on systems with HT Technology, multiple processors, or dual core 
processors. If you do not know whether you have a multi-processor, dual core, or 
HT Technology enabled system, please see the ReadMe file for simple instructions 
on checking your system.
 
Please note that Call of Duty 2 is a 
very graphically intense game. The greatest performance increase from this 
upgrade will be realized by selecting Optimal System Settings in the Options 
menu.
 
This update supports US/UK English, French, German, Spanish, Italian, 
Polish, and Russian language versions of Call of Duty 2 
only.