无法定位程序输入点 IsThreadDesktopComposited 于动态链接库 USER32.dll 上

IsThreadDesktopComposited could not be located

---

Even the latest "USER32.DLL" version (5.1.2600.3099) for WinXP does not 
 
 have that entry point. Therefore, at least one system file (and not USER32.DLL) has been replaced with the Vista version of that system file. 
 
 That system file will be hard to find.