How to Troubleshoot the Defragmenter in Vista

Method One
1. Go to 'Start > Run' on your computer.
2. Type in '%Windir%\Inf' and hit 'OK.' A file should pop up on the right side of the window.
3. Right click on the file name and hit 'Install.' This will reinstall the defragmenter program, which may eliminate any problems you may be having.
Method Two
4. Go to 'Start > Run' on your computer.
5. Type in 'rundll32.exe setupapi,InstallHinfSection DefaultInstall 132 %windir%\inf\dfrg.inf.'
6. Hit 'OK' to make the program automatically reinstall itself.
Method Three
7. Log onto your computer as an Administrator.
8. Press down on the 'Shift' key while right clicking on your desktop. This will open the Command Prompt.
9. Type in 'regsvr32 dfrgsnap.dll' and hit 'Enter.'
10. Type in 'regsvr32 dfrgui.dll' and hit 'Enter.' This will reinstall any missing software pieces.