GOOGLE is GREAT
HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Explorer\Streams
HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Explorer\StreamMRU
The above 2 keys are used in all versions of Windows (since 95/NT); Windows XP also uses the following keys, so you might want to delete these too:
HKEY_CURRENT_USER\Software\Microsoft\Windows\Shell\Bags
HKEY_CURRENT_USER\Software\Microsoft\Windows\Shell\BagMRU
HKEY_CURRENT_USER\Software\Microsoft\Windows\ShellNoRoam\Bags
HKEY_CURRENT_USER\Software\Microsoft\Windows\ShellNoRoam\BagMRU
(the pane on the left with groups like file/folder tasks, other places, details, etc) is stored in the following key:
HKEY_CURRENT_USER\Software\Microsoft\Windows\ShellNoRoam\DUIBags
Delete that to reset this data too.
I woulda found it if my machine had problems
you can to, just goolgize it all