Windows XP build 3790.1069

Windows XP Professional x64 Edition build 3790.1069 is the earliest available build of Windows XP Professional x64 Edition. This build is based on the Server 2003 version and thus has the Windows Classic theme with no background (Luna theme is absent in this build). The 32-bit editions of both Internet Explorer and Windows Media Player do not work. This build still identifies itself as Windows XP 64-Bit Edition 2003.

Installation
This build must be installed on an AMD processor as attempting to install it on an 64-bit Intel processor will result in a bugcheck. QEMU, VMware, and VirtualBox are known to install this build, although it is recommended to use an AMD CPU on the host for the latter two to prevent the aforementioned bugcheck.

SysFader
The SysFader effects in this build can cause Explorer and other applications to hang when displaying menus. A workaround is to either disable the fade effects or use the scroll animation in place of the fade.