Based on your previous post, the stuff under HKCR\Drive looks fine, but there are two others keys which need to be checked because their commands "cascade" back to "Drive". The "Directory" file type refers to physical folders. The "Folder" file type refers to all "folder-like" objects, including things like "My Computer" and "My Documents". The "Folder" file type works sort of as the "master" for all of these -- if a given command is not defined for either "Directory" or "Drive", the command for "Folder" is used. Similarly, if the default command for either "Drive" or "Directory" is set to "none", then the default command for "Folder" is used for those object types.
So, first, look under HKCR\Folder\shell:
* The (default) string value for the "shell" key should be set to either "open" or "explore", depending on how you want folders (or drives) to be opened (i.e., in single-pane or dual-pane view, respectively) when you double-click them.
* Under HKCR\Folder\shell\open\command, the (default) string value should show REG_EXPAND_SZ in the "type" column, and its value should be
%SystemRoot%\Explorer.exe /idlist,%I,%L
* Under HKCR\Folder\shell\explore\command, the (default) value should also show REG_EXPAND_SZ in the "Type" column, and its value should be:
%SystemRoot%\Explorer.exe /e,/idlist,%I,%L
*
There should be no other subkeys under HKCR\Folder\shell except "open" and "explore".
Under HCKR\Directory\shell:
* The (default) string value should be set to "none".
* Normally, the "open" and "explore" subkeys do not exist. The only subkey there should be "find".
Greg Wolking
Moderator, PC Magazine Discussions