CHKDSK (short for "Check Disk") is a foundational command-line utility built into every version of Windows. Its primary purpose is to verify the logical integrity of a file system and repair errors on your hard drive or SSD. By scanning your storage media, CHKDSK ensures that the operating system can reliably locate, organize, and access your files without data loss or system crashes. Why Run CHKDSK?
While modern versions of Windows perform many background maintenance tasks, CHKDSK remains critical for troubleshooting specific issues: chkdsk - Microsoft Learn chkdsk