Symptoms
When you open the Properties dialog box for the local hard disk and then click the Tools tab, one of the following symptoms may occur:
- The Defragment Now button is unavailable
- When you click Defragment Now, you receive the following error message:
The Disk Defragmenter is not installed on your computer. To install it, double-click the Add or Remove Programs icon in Control Panel, click the Install/Uninstall tab, and then follow the instructions on your screen.
Resolution
To resolve this issue, follow these steps:
- Click Start, click Run, type %Windir%\Inf, and then click OK.
- Right-click the dfrg.inf file, and then click Install.
Alternately, you can reinstall Disk Defragmenter using the following command:
Click Start, Run and type:
rundll32.exe setupapi,InstallHinfSection DefaultInstall 132 %windir%\inf\dfrg.inf
If the Defrag Snap-in fails to initialize, type these commands in Start, Run dialog one by one:
- regsvr32 dfrgsnap.dll
- regsvr32 dfrgui.dll
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