Weitere Infos:
Computers that are running Windows XP Service Pack 2 and that are equipped with multiple processors that support processor power management features may experience decreased performance
http://support.microsoft.com/kb/896256
.
Game performance may be poor on a Windows XP-based computer that is using a dual-core processor
http://support.microsoft.com/kb/909944
.
Windows XP für Dual-Core optimieren
http://www.tomshardware.de/Windows-X...te-239923.html