Win10/win8.1/win7 system C disk change volume invalid how to do

1, first press win+X button under win10, then select "ldquo; command prompt (admin)" in the menu.
2. At the command prompt, type: LABEL C: Enter.
3. When the following information is displayed, press the Enter key to continue (the above figure is an example, the volume label is empty):
The volume in drive C: is xxxxxxxx
The volume serial number is xxxxx< Br> Volume label (32 characters; if not, press Enter)?
4. When asked if you want to delete the current label, press the Y key, then press the Enter key, the command will clear the C drive label. After the cleaning is completed, try again to set the volume label for the C drive.