Note on System Files: Version 2.1 restores both executable .exe and library .dll files under a temporary .exe structure. If a restored system tool fails to execute immediately, manually renaming its extension to .dll typically restores functionality. Step-by-Step Recovery Guide
deCHK v2.1 was released in 2012. Modern file formats (e.g., HEIC, WebP, newer Office Open XML versions, MKV) are not supported. The developer has stated that the source code is “long lost,” so no future updates are expected. download dechk v2.1
You can find the official version of this tool on the developer's site at Techcrawler.de . Note on System Files: Version 2
files and identifies their original format based on file headers. heise online Download and Source newer Office Open XML versions