When looking at the directories and files on the drive some are displayed in blue (I use WindowsXP) and TuneUp Utilities tell me to run "Chhdsk /f" but it reverts back to running Chkdsk on my C drive. I have no problems accessing all the files, and have run Kasperpersky 2014 Scan and no problems are encountered. How can I run Chkdsc /f ? Many thanks Peter Gruner petgrun@gmail.com .