.

The location of the NK2 file created by Outlook might be different from one computer to another, depending on the operating system and the version of Outlook.  Refer following path to fond the file

For : Outlook 2003/2007 with Windows 2000, Windows XP, or Windows Server 2003
Location : C:\Documents and Settings\[User name]\Application Data\Microsoft\Outlook

For : Outlook 2003/2007 with Windows Vista, Windows 7, or Windows server 2008

Location : C:\Users\[User Profile]\AppData\Roaming\Microsoft\Outlook

For: Outlook 2010 with Windows Vista, Windows 7, or Windows server 2008

Location : C:\Users\win764\AppData\Local\Microsoft\Outlook\RoamCache

The file will be in .dat format

For : Outlook 2010 with Windows XP

Location : C:\Documents and Settings\[User Profile]\Local Settings\Application Data\Microsoft\Outlook\RoamCache

The file will be in .dat format