Microsoft Internet Explorer v8 and above installs as standard an IETLdCache INDEX.DAT file in the following location.
IETldCache in Windows XP
C:\Documents and Settings\{user}\IETldCache\index.dat
IETldCache in Windows Vista / 7
C:\Users\{user}\AppData\Roaming\Microsoft\Windows\IETldCache\index.dat
C:\Users\{user}\AppData\Roaming\Microsoft\Windows\IETldCache\Low\index.dat
Figure 1 shows a single record from the INDEX.DAT file.
Figure 1
Note
These records are maintained by Microsoft and are not related to the browsing history or habits of the user. They are present in a clean installation of the browser. It is not known what these records are used for.