The File Extensions Database

.CHK File Extension

  • Developer by: Sophos
  • Category: Data Files

What is an .CHK file?

.CHK is InterCheck Checksum Database

A CHK file is a database file that contains virus definitions for Sophos Anti-Virus. It is updated with InterCheck, a service that checks a central virus reporting system, and can be modified by changing the InterCheck reporting level and syslog configuration settings.

The InterCheck database is named "interchk.chk" by default. It is stored in the /Program Files/Sophos/Sophos Anti-Virus/Config directory on Windows computers.

Programs that open InterCheck Checksum Database
Sophos Anti-Virus
Sophos Anti-Virus
Sophos Anti-Virus
File Type 2 Saved File Fragment
Developer by: Microsoft Category: Misc Files Format: Binary

Windows file fragment cleaned from the hard disk by ScanDisk or CHKDISK; stored in the FOUND folder after a disk scan has been performed; typically can be deleted since the information has been moved somewhere else on the disk.

The program CHK-Mate can be used to examine the contents of a CHK file before it is removed. Also, UnCHK and FileCHK can be used to recover data from CHK files.

Programs that open Saved File Fragment
DIY DataRecovery CHK-Mate
File Type 3 StarCraft Chunk File
Developer by: Blizzard Entertainment Category: Game Files

Uncompressed Starcraft map included with the Blizzard installer CD; similar to a .MPQ formatted file, such as a .SCM or .SCX scenario file, but is not compressed into an archive format.

Programs that open StarCraft Chunk File
Blizzard StarCraft
Blizzard StarCraft
File Type 4 Netgear Router Firmware File
Developer by: Netgear Category: System Files

File used by Netgear routers when updating the firmware; stores low-level system data that runs the router; can be used for applying router updates using the Netgear Web browser interface, which is often accessed at the local local network address.

How to solve problems with CHK files

  • Associate the CHK file extension with the correct application. On :
    Windows: Right click on any CHK file and then click "Open with" > "Choose another app". Now select another program and check the box "Always use this app to open *.CHK files". Mac: Right click (or Ctrl-click) the CHK file, then click "Open with" > "Other...". Then choose another program and check the "Always Open With" box. Linux: Right click on the file, and select "Open with" and choose another program. iPhone: Tap the file. If you do not see an app to open the file, then tap Share "Share" and choose an app. Alternatively, save the file. Then open the Files app Files app. There long-press on the file, then release your finger. You will see a black menu bar. Then tap "Share" and select an app. Android: Tap the Settings icon on your smartphone, then tap on the Apps section. There tap the Options icon in the top right-hand corner of the screen to change the default apps.
  • Update your software that should actually open .CHK is InterCheck Checksum Database. Because only the current version supports the latest CHK file format. Search, therefore, e.g. on the Sophos manufacturer website after an available .CHK is InterCheck Checksum Database update.
  • To make sure that your CHK file is not corrupted or virus-infected, get the file again and scan it with antivirus software.