Microsoft Windows XP

 

C:\Documents and Settings\{user}\Local Settings\Temporary Internet Files\Content.IE5\index.dat

Microsoft Windows Vista / 7

 

C:\Users\{user}\AppData\Local\Microsoft\Windows\Temporary Internet Files\Content.IE5\index.dat
C:\Users\{user}\AppData\Local\Microsoft\Windows\Temporary Internet Files\Low\Content.IE5\index.dat
C:\Users\{user}\AppData\Local\Temp\Low\Temporary Internet Files\Content.IE5\index.dat