A user reports an issue of intermittent Read / Write errors occurring on their PC. Which of the following actions would a technician MOST likely take?

FDISK is a partitioning tool used to create, delete, or manage disk partitions - it cannot diagnose or repair read/write errors.

A virus scan checks for malware infections, which is unrelated to the hardware-level read/write errors being reported.

A low-level format destroys all data on the drive and is a last resort, not an appropriate first diagnostic step for intermittent errors.

CHKDSK (Check Disk) scans the file system and disk surface for logical errors, bad sectors, and file system corruption, then attempts to repair them. It directly addresses the symptom of intermittent read/write errors by identifying and marking bad sectors so the OS avoids writing to them. This is the standard first-response diagnostic tool for disk-related errors in Windows.