Notes about the NK2 file extension:
Incorrect file associations could be the result of underlying issues within your PC system. As such it is highly recommended to scan your PC for invalid registry entries, unused processes and other unfavourable system settings to identify slowdown issues.
The NK2 file type is primarily associated with 'Outlook' by Microsoft Corporation. A data file (normally hidden) that contains data Outlook needs to automatically fill in data for you. If you need to delete it to allow Outlook to recreate it (as when Outlook gets confused by changed addresses) it's in the C:\Documents and Settings\Username\Application Data\Microsoft\Outlook directory which is normally hidden. The file may also have your profile name as its rootname.
Detailed information for file extension NK2:
Hex: 0D F0 AD BA 0A 00 00 00
'Identifying characters' used on FILExt.com are
provided by Marco Pontello from his TrID database
Important: Invalid file associations could be the result of underlying issues within your Windows PC. It is highly recommended that you scan your PC for invalid registry entries, unused processes and other slowdown issues.
To view technical data on file-extension NK2 click this link
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System Info for File Extension .NK2
The following listing is compiled from the database produced by the 'Associate This!' program, selected data from the main FILExt database and information FILExt collected directly
from user systems.
ProgramID: NICKFile, FileType: Office Data File