Here are the registry keys where Windows gets the Visual Effects settings when a user profile is created.
If you modify the settings below with the appropriate dword value, you can set the default Visual Effects settings for every user that gets created.
I'm also attaching a .reg file
<==BEGIN REGISTRY SETTINGS==>
Windows Registry Editor Version 5.00
;Sets Visual Effects to Custom
[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\VisualEffects]
"VisualFXSetting"=dword:00000003
;Change dword:00000000 to dword:00000001 to enable the appropriate option
;Animate windows when minimizing and maximizing
[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\VisualEffects\AnimateMinMax]
"DefaultValue"=dword:00000000
;Slide open combo boxes
[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\VisualEffects\ComboBoxAnimation]
"DefaultValue"=dword:00000000
;Animate controls and elements inside windows
[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\VisualEffects\ControlAnimations]
"DefaultValue"=dword:00000000
;Show shadows under mouse pointer
[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\VisualEffects\CursorShadow]
"DefaultValue"=dword:00000000
;Show window contents while dragging
[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\VisualEffects\DragFullWindows]
"DefaultValue"=dword:00000000
;Show shadows under windows
[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\VisualEffects\DropShadow]
"DefaultValue"=dword:00000000
;Smooth edges of screen fonts
[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\VisualEffects\FontSmoothing]
"DefaultValue"=dword:00000000
;Smooth-scroll list boxes
[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\VisualEffects\ListBoxSmoothScrolling]
"DefaultValue"=dword:00000000
;Show translucent selection rectangle
[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\VisualEffects\ListviewAlphaSelect]
"DefaultValue"=dword:00000000
;Use drop shadows for icon labels on the desktop
[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\VisualEffects\ListviewShadow]
"DefaultValue"=dword:00000000
;Fade or slide menus into view
[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\VisualEffects\MenuAnimation]
"DefaultValue"=dword:00000000
;Fade out menu items after clicking
[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\VisualEffects\SelectionFade]
"DefaultValue"=dword:00000000
;Animations in the taskbar and StartMenu
[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\VisualEffects\TaskbarAnimations]
"DefaultValue"=dword:00000000
;Fade or slide ToolTips into view
[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\VisualEffects\TooltipAnimation]
"DefaultValue"=dword:00000000
<==END REGISTRY SETTINGS==>