Here you can find a list of some useful registry tweaks in Vista..

;Desktop: Font Smoothing to ClearType

[HKEY_CURRENT_USER\Control Panel\Desktop]

"FontSmoothing"="2"

;Desktop: Disable Windows Sidebar

[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Windows\Sidebar]

"TurnOffSidebar"=dword:00000001

;Desktop: Remove Shortcuts

[HKEY_CLASSES_ROOT\lnkfile]

"IsShortcut"=-

;Explorer: Disable Thumbnail Cache

[HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Explorer\Advanced]

"DisableThumbnailCache"=dword:00000001

;Explorer: Show Menubar

[HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Policies\Explorer]

"AlwaysShowClassicMenu"=dword:00000001

;Internet Explorer: Disable Tabbed Browsing

[HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\Internet Explorer\TabbedBrowsing]

"Enabled"=dword:00000000

;Internet Explorer: Disable Update Check

[HKEY_CURRENT_USER\Software\Microsoft\Internet Explorer\Main]

"NoUpdateCheck"=dword:00000000

;Internet Explorer: Change startpage

[HKEY_CURRENT_USER\Software\Microsoft\Internet Explorer\Main]

"Start Page"="http://www.google.de/"

;Internet Explorer: Disable 'Download finished'-Popup

[HKEY_CURRENT_USER\Software\Microsoft\Internet Explorer\Main]

"NotifyDownloadComplete"="no"

;Internet Explorer: Enable Smooth Scrolling

[HKEY_CURRENT_USER\Software\Microsoft\Internet Explorer\Main]

"SmoothScroll"=dword:00000001

;Internet Explorer: Disable 'Script debugger'

[HKEY_CURRENT_USER\Software\Microsoft\Internet Explorer\Main]

"Disable Script Debugger"="yes"

;Internet Explorer: Disable Statusbar

[HKEY_CURRENT_USER\Software\Microsoft\Internet Explorer\Main]

"Show_StatusBar"="yes"

;Recycle Bin: Skip the Recycle Bin Confirmation Message

[HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Explorer]

"ShellState"=hex:24,00,00,00,37,a8,01,00,00,00,00,00,00,00,00,00,00,00,00,00,\

01,00,00,00,0d,00,00,00,00,00,00,00,02,00,00,00

;Startmenu: Display AdminTools in Startmenu

[HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Explorer\Advanced]

"StartMenuAdminTools"="YES"

;System: Disable Windows Media Digital Rights Management (DRM)

[HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\WMDRM]

"DisableOnline"=dword:00000001

;System: Disable SQMClient 'Programm zur Verbesserung der Benutzerfreundlichkeit'

[HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\SQMClient\Windows]

"CEIPEnable"=dword:00000000

;System: Modify Programs Location Folder

[HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion]

"ProgramFilesDir"="C:\Program Files"

;System: Disable User Account Protection (UAP)

[HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System]

"EnableLUA"=dword:00000000

;System: To login as Administrator

[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon\SpecialAccounts\UserList]

"Administrator"=dword:00000001

;System: Disable Windows Error Reporting

[HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\Windows\Windows Error Reporting]

"Disabled"=dword:00000001

;System: Disable 'New Hardware was found'-Popup

[HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\Windows\DeviceInstall\Settings]

"DisableBalloonTips"=dword:00000001

;Windows Mail: Disable Windows Mail Splash Screen

[HKEY_CURRENT_USER\Software\Microsoft\Windows Mail]

"NoSplash"=dword:00000001

;Windows Mail: Disable Access to Windows Mail

[HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\Windows Mail]

"ManualLaunchAllowed"=dword:00000000

;WindowsMediaPlayer: Disable Auto-Updates

[HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\WindowsMediaPlayer]

"DisableAutoUpdate"=dword:00000001

;WindowsMediaPlayer: Disable Automatic Codec Download

[HKEY_CURRENT_USER\Software\Policies\Microsoft\WindowsMediaPlayer]

"PreventCodecDownload"=dword:00000001

Hey cool!

You should remove the part where it disables error reporting. Services should never be disabled.