A users Windows desktop has low disk space. A technician thinks some upgrade files were never removed. Which of the following tools should me technician use to correct the issue?

`devmgmt.msc` opens Device Manager, which is used to manage hardware devices and drivers, not to free up disk space.

`cleanmgr.exe` is the command-line executable for the Disk Cleanup utility in Windows. This tool is specifically designed to identify and remove various types of unnecessary files, including temporary files, Recycle Bin contents, old Windows update files, and previous Windows installation files (which often accumulate after upgrades), making it the most appropriate tool for freeing up disk space in this scenario.

`dfrgui.exe` opens the Drive Optimizer (Defragment and Optimize Drives) utility, which reorganizes data on a drive to improve performance but does not free up significant disk space.

`diskmgmt.msc` opens Disk Management, which is used for partitioning, formatting, and managing disk volumes, not for removing temporary files or upgrade files.