Symptom
When you open the Folder Options applet in Control Panel, the options Single-click to open an item (point to select) and Show Common tasks in folders may be grayed out.
Resolution
This happens if the Turn on classic shell policy is enabled. For standalone Windows XP systems, follow the steps below to remove the Turn on classic shell policy setting.
HKEY_LOCAL_MACHINE \ Software \ Microsoft \ Windows \ CurrentVersion \ Policies \ Explorer
HKEY_CURRENT_USER \ Software \ Microsoft \ Windows \ CurrentVersion \ Policies \ Explorer
If you are using Windows XP Professional Edition, you may also use the Group Policy Editor to configure this setting:
User Configuration | Administrative Templates | Windows components | Windows Explorer
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“Single-click to open an item” choice in Folder Options is grayed out (Windows XP) » HeelpBook http://heelpbook.altervista.org/2012/single-click-to-open-an-item-choice-in-folder-options-is-grayed-out-windows-xp/ #heelpbook via @HeelpBook