You can find the current volume label for drive C by entering a command in the Command Prompt. Press Win + R keys to launch the Run command box. After that, type cmd and click OK. This will launch the Command Prompt. Now type the following command and hit Enter.
vol c:
The above command will show you the volume label and the volume serial number of the drive C.
You can also view the current volume label of the C drive in the File Explorer. In the File Explorer, the name displayed before the drive letter is the volume label of that drive. The same can be viewed in the General tab of the drive properties.