Here are the paths that you can find the Autocomplete ( there are other):
C:\Documents and settings\<Local user>\Favorites
[-]HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Explorer\AutoComplete =
[-]HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Explorer\UserAssist.
[-]HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Explorer\Map
Network Drive MRU
[-]HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Explorer\ComDlg32\LastVisitedMRU
[-]HKEY_CURRENT_USER\Software\Microsoft\Internet Explorer\TypedURLs
[-]HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Explorer\RecentDocs
You can Edit the value there to Allow or prevent AutoComplete, but it will
be the same if you used the GUI on the IE properties.
HTH.
Regards,
nass