Hi!
CHKDSK is an abbreviation for Check Disk which is a function that checks your hard disk a.k.a. your hard drive for any errors misplaced system fold and the like and once it is done check for those things it will display the results of the scan.
To run CHKDSK on windows you need to press the START button in the bottom left-hand corner of your taskbar, then you want to use the search function of the START menu to find the RUN program, then once the RUN program is up you want to type cmd in the text bar and select run, once you have done this your PC's command module will pop-up and allow you to type a command, the command you need to type is CHKDSK and press enter and it will run the Check Disk function.
