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.
Pernah mengalami hal seperti di atas...
ok, kita selesaikan masalah tersebut.
Cara:
1. buka regedit di run
2. arahkan ke HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\explorer\MyComputer\DefragPath
3. double klik bagian (Default) dan set value "C:\Windows\System32\dfrgui.exe"
dan... sekarang coba untuk mendefrag.
END.
