HKEY_CLASSES_ROOT\Directory\shell and
HKEY_CLASSES_ROOT\Drive\shell
Default values should be set to 'none'. That should fix the opening in new windows. If there's more trouble, here's the XP default settings (I omitted the 'shellex' subkeys as there's some things there specific for my setup) - note the DefaultIcon keys:
Windows Registry Editor Version 5.00
[HKEY_CLASSES_ROOT\Drive]
@="Drive"
"EditFlags"=hex:d2,01,00,00
[HKEY_CLASSES_ROOT\Drive\DefaultIcon]
@=hex(2):25,00,53,00,79,00,73,00,74,00,65,00,6d,00,52,00,6f,00,6f,00,74,00,25,\ 00,5c,00,53,00,79,00,73,00,74,00,65,00,6d,00,33,00,32,00,5c,00,73,00,68,00,\ 65,00,6c,00,6c,00,33,00,32,00,2e,00,64,00,6c,00,6c,00,2c,00,38,00,00,00
[HKEY_CLASSES_ROOT\Drive\shell]
@="none"
[HKEY_CLASSES_ROOT\Drive\shell\find]
"SuppressionPolicy"=dword:00000080
[HKEY_CLASSES_ROOT\Drive\shell\find\command]
@=hex(2):25,00,53,00,79,00,73,00,74,00,65,00,6d,00,52,00,6f,00,6f,00,74,00,25,\
00,5c,00,45,00,78,00,70,00,6c,00,6f,00,72,00,65,00,72,00,2e,00,65,00,78,00,\
65,00,00,00
[HKEY_CLASSES_ROOT\Drive\shell\find\ddeexec]
@="[FindFolder(\"%l\", %I)]"
"NoActivateHandler"=""
[HKEY_CLASSES_ROOT\Drive\shell\find\ddeexec\application]
@="Folders"
[HKEY_CLASSES_ROOT\Drive\shell\find\ddeexec\topic]
@="AppProperties"
[HKEY_CLASSES_ROOT\Directory]
@="File Folder"
"AlwaysShowExt"=""
"EditFlags"=hex:d2,01,00,00
"InfoTip"="prop:DocComments"
[HKEY_CLASSES_ROOT\Directory\Background]
[HKEY_CLASSES_ROOT\Directory\Background\shellex]
[HKEY_CLASSES_ROOT\Directory\Background\shellex\ContextMenuHandlers]
[HKEY_CLASSES_ROOT\Directory\Background\shellex\ContextMenuHandlers\New]
@="{D969A300-E7FF-11d0-A93B-00A0C90F2719}"
[HKEY_CLASSES_ROOT\Directory\DefaultIcon]
@=hex(2):25,00,53,00,79,00,73,00,74,00,65,00,6d,00,52,00,6f,00,6f,00,74,00,25,\
00,5c,00,53,00,79,00,73,00,74,00,65,00,6d,00,33,00,32,00,5c,00,73,00,68,00,\
65,00,6c,00,6c,00,33,00,32,00,2e,00,64,00,6c,00,6c,00,2c,00,33,00,00,00
[HKEY_CLASSES_ROOT\Directory\shell]
@="none"
[HKEY_CLASSES_ROOT\Directory\shell\find]
"SuppressionPolicy"=dword:00000080
[HKEY_CLASSES_ROOT\Directory\shell\find\command]
@=hex(2):25,00,53,00,79,00,73,00,74,00,65,00,6d,00,52,00,6f,00,6f,00,74,00,25,\
00,5c,00,45,00,78,00,70,00,6c,00,6f,00,72,00,65,00,72,00,2e,00,65,00,78,00,\
65,00,00,00
[HKEY_CLASSES_ROOT\Directory\shell\find\ddeexec]
@="[FindFolder(\"%l\", %I)]"
"NoActivateHandler"=""
[HKEY_CLASSES_ROOT\Directory\shell\find\ddeexec\application]
@="Folders"
[HKEY_CLASSES_ROOT\Directory\shell\find\ddeexec\topic]
@="AppProperties"