In Windows 7 and Windows Vista, selectStart.
In Windows XP and earlier, go toStartand thenRun.
However, running an executable program from the search or Run box accomplishes the same thing.

In the strictest sense,diskmgmt.mscis just the Run command for the program.
Wait while Disk Management opens.
It should be immediate, but it might take a few moments for the whole program to load.

Just pressWIN+Xto bring up the menu, then clickDisk Management.
In Windows 8.1 and newer, right-clicking the Start button works, too.
Another way to use the Disk Management command is fromTask Manager.

The Task Manager method is the exact same as using the Run dialog box.
FAQ
Toopen the Command Promptfrom File Explorer, select theaddress bar, typecmd>Enter.
In the Command Prompt, typestart ms-options:and pressEnterto immediately launch the options app.