When you install software, operate programs, and surf the Internet, temporary files are created. These files can clutter your computer and slow it down. Windows comes with a Disk Cleanup utility that removes temporary files and empties the Recycle Bin. Clearing out these files helps free up valuable hard disk space.
Windows XP
To Use Windows Disk Cleanup:
- Click Start.
- Choose Programs
Accessories
System Tools
Disk Cleanup.
- The Select Drive dialog box asks you to "Select the drive you want to clean up."

- The C: drive is usually selected by default.
- Click OK to accept DRIVE_C (C:).
- The Disk Cleanup for DRIVE_C (C:) dialog box appears.
- Select Temporary Internet Files, Temporary Files and/or Recycle Bin.
- Click OK and the temp files you selected will be cleaned up.

Windows Vista
To Use Windows Disk Cleanup:
- Click Start.
- Choose Programs
Accessories
System Tools
Disk Cleanup.
- A Disk Cleanup information box appears as Windows calculates how much disk space you can free up on the C drive.
- The Disk Cleanup dialog box for drive C appears. Note: If the Disk Cleanup: Drive Selection dialog box appears, select the hard disk drive that you want to clean up, and then click OK. If not, the C drive will be chosen by default.

- Select the check boxes for the files you want to delete on the Disk Cleanup tab.
- Click OK when you finish selecting the files you want to delete.
- Click Delete Files to confirm the operation. Disk Cleanup will remove all the requested files from your computer.