After extensive searches, no known fixes to restoring Basic Search after Windows Search 4.0 can be found that work. However,changing
HKEY_CURRENT_USER\Software\Microsoft\Windows Desktop Search\DS
ShowStartSearchBand=dword:from 1 to 0 changes Windows search back to the default search of Windows 2000.
To get the Search Assistant Dog back, go to:
HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Explorer\CabinetState, Use Search Asst—Choose Yes or No.