For Windows, I would recommend WinDirStat. On Linux, a good choice would be the similar (and predecessor) KDirStat.
Examples of disk cleanup programs include CCleaner, which removes unnecessary files and cleans up the Windows Registry, and BleachBit, an open-source option that frees up disk space by deleting cache, cookies, and other junk files. Windows has a built-in Disk Cleanup tool that helps users reclaim space by deleting temporary files, system files, and more. Additionally, Mac users can utilize the built-in Optimize Storage feature or third-party apps like CleanMyMac.
Eat some cheese and take a bath then do disk cleanup
Disk Cleanup
Running the disk cleanup utility is a quick way to?
In Vista the path is: Start, All Programs, Accessories, System Tools, Disk Cleanup.
Anything you delete in disk cleanup is a temporary file and non essential to your computer.
removes unnecessary files
removes unnecessary files
Disk Defragmenter
Yes, it is supposed to do that.
chkdsk
For Windows 95, 98 and ME Disk Cleanup, Scandisk Defrag _________________________ For Windows 2000 / XP Disk Cleanup, Defrag, chkdsk/r