Without proper software you will receive a Windows message ' How do you want to open this file?' or ' Windows cannot open this file' or a similar Mac/iPhone/Android alert. You need a suitable software like ScanDisk to open a CHK file. Starcraft game stores uncompressed map data in a CHK file. Additionally, CHK files also find use in Netgear routers where they are involved in firmware updates via the Netgear Web browser and storage of low-level data that is used for running the router. These CHK files can be changed using the InterCheck reporting level and configuration settings linked with Syslog. Intercheck service is used for updating these CHK files while checking the main virus reporting system.

Other Uses: CHK file is also used as a database file that contains virus definitions for Sophos Anti-Virus.

CHK files are usually hidden on Windows PC and can be unhid using the Show hidden files option in Windows Explorer. Any chunks of corrupted data subsequently found are saved as CHK files in a folder named FOUND within the same drive where the scan has been performed. In an attempt to recover bad sectors on the hard disk, Windows runs chkdsk (it can also be run from the command line directly by the user).

Main Use: Microsoft Windows systems contain an inbuilt tool called chkdsk, short for Check Disk.CHK files are files associated with storing file fragment data on Windows PCs.

CHK files mostly belong to ScanDisk by Microsoft.

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