IsMyHdOK is a free app (or website) designed to help users diagnose and repair hard drive issues. It can check for any errors or problems on the user’s hard drive, as well as check for disk fragmentation and other disk-related issues. It can also create a disk report that can provide more detailed information about the disk’s health. In addition to hard drive diagnostics, IsMyHdOK can also help users clean up their PCs by removing junk files, temporary files, and other unnecessary files. It can also be used to optimize a computer’s performance by defragmenting the hard drive and optimizing the Windows registry.
Discontinued project has been discontinued by notice: http://hddguardian.codeplex.com/