The volume appears to contain one or more unrecoverable problems
After running the chkdsk command you may get the volume appears to contain one or more unrecoverable problems error. This error indicates the hard drive or partition has a serious error that chkdsk cannot resolve and that the hard drive is either seriously corrupt or has failed.
The hard drive can be tested using specialized disk drive utilities designed to test and fix failures if possible.
If the hard drive passes the tests or you believe the hard drive is not at fault we suggest erasing everything and reinstalling Windows to resolve any serious disk corruption.