@echo on&setlocal EnableDelayedExpansion

set regadd=reg add "HKCU\Control Panel\Desktop
%regadd%" /v TileWallpaper /d "0" /f
%regadd%" /v Wallpaper /d "D:\AA.bmp" /f
%regadd%" /v WallpaperStyle /d "0" /f
gpupdate /force
RunDll32.exe USER32.DLL,UpdatePerUserSystemParameters


另外我系统中已安装有两个鼠标主题a和b，当前使用的是a主题，我用批处理导入一个注册表文件用于更换鼠标主题为b，但是要重启后才能生效，有什么办法可以直接生效？（我更改鼠标主题的注册表文件是通过监控注册表变化弄出的，文件很大，有什么好的方法可以简单地对已有主题进地更改？）

上面代码使用.bmp没问题，你可能激活了Web主题
鼠标主题可以在.theme里指定

Arrow=%WinDir%Resources\Themes\Cursors\Vista\Arrow.cur
Help=%WinDir%Resources\Themes\Cursors\Vista\Help_S.cur
AppStarting=%WinDir%Resources\Themes\Cursors\Vista\AppStarting_S.ani
Wait=%WinDir%Resources\Themes\Cursors\Vista\Wait_S.ani
NWPen=%WinDir%Resources\Themes\Cursors\Vista\Handwriting.cur
No=%WinDir%Resources\Themes\Cursors\Vista\NO_S.cur
SizeNS=%WinDir%Resources\Themes\Cursors\Vista\SizeNS.cur
SizeWE=%WinDir%Resources\Themes\Cursors\Vista\SizeWE.cur
Crosshair=%WinDir%Resources\Themes\Cursors\Vista\Cross.cur
IBeam=%WinDir%Resources\Themes\Cursors\Vista\IBeam.cur
SizeNWSE=%WinDir%Resources\Themes\Cursors\Vista\SizeNWSE.cur
SizeNESW=%WinDir%Resources\Themes\Cursors\Vista\SizeNESW.cur
SizeAll=%WinDir%Resources\Themes\Cursors\Vista\SizeAll.cur
UpArrow=%WinDir%Resources\Themes\Cursors\Vista\UpArrow.cur
DefaultValue=Windows 默认
Link=%WinDir%Resources\Themes\Cursors\Vista\Hand.cur