CHKDSK can be invoked by typing its name in the following places:
CHKDSK also has a number of switches that can be added to it to make it operate in different ways. A common switch is /R - which makes CHKDSK find bad sectors and recover any readable information from these. The /R is useful because it implies the /F switch as well, which means that CHKSDSK will also fix errors on the disk.
A previous version of CHKDSK found on earlier Windows systems was called Scandisk.