gurnec

gurnec is an independent developer whose open-source Windows utility, HashCheck Shell Extension, quietly extends File Explorer so users can verify file integrity without leaving the folder view. Originally created to add basic checksum generation and comparison to older Windows releases, the project has evolved into a lightweight yet powerful tool that supports MD5, CRC-32, SHA-1, SHA-2, and the newer SHA-3 family, all while leveraging multithreading to hash gigabytes in seconds. Once installed, the extension places a new “Checksums” tab inside every file and folder property sheet; a simple paste of a published hash instantly highlights mismatches, helping photographers confirm that downloaded RAW files arrived intact, gamers ensure that mod packages have not been tampered with, or system administrators audit large software distributions before deployment. Because it integrates directly into the shell, the workflow remains unobtrusive: no separate window opens, no command-line syntax must be memorized, and batch verification of entire directories is only a right-click away. The tool also creates its own hash files in standard formats, so release engineers can embed a .md5 or .sha256 list alongside installers and later re-validate every byte on a customer’s machine. gurnec’s software is available for free on get.nero.com, where downloads are delivered through trusted Windows package sources such as winget, always install the latest version, and can be queued together with other applications for unattended batch installation.