A security issue has been identified that could allow an attacker to compromise a computer running Windows and gain complete control over it. You can help protect your computer by installing this update from Microsoft. After you install this item, you may have to restart your computer.
Download: Security Update for Windows XP 64-bit Edition (KB833987)
View: Microsoft Security Bulletin
Cont...
Gameplay, which was owned and operated by Andy Mee and Lisa Burke, who will continue to helm the company following the acquisition, has had a chequered history.
The firm went through a period of massive expansion during the dot.com boom, fuelled by a major stock market flotation. That expansion saw the firm buying up BT's Wireplay online gaming service and launching its own TV show on Sky One, as well as planning to launch itself as a game publisher.
However, the technology crash hit Gameplay.com (as then was) hard, and eventually the profitable boxed games business was bought out by its management as the remainder of the company collapsed.

SVT
This title is misleading too, as people on XP and XP SP1 are also affected, not just XP64.
Both articles point to the same MS Bulletin
here is the link to the fix for XP
Windows XP and Windows XP Service Pack 1
Windows XP 64-Bit Edition Service Pack 1
Windows XP 64-Bit Edition Version 2003
Windows Server 2003
Windows Server 2003 64-Bit Edition
Office 2003
Office XP Service Pack 3
Visio 2003 (All versions)
Visio 2002 Service Pack 2 (All versions)
Project 2003 (All versions)
Project 2002 Service Pack 1 (All versions)
Windows XP 64-Bit Itanium Edition Service Pack 1
Windows XP 64-Bit Itanium Edition Version 2003
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