upon start-up, CHKDSK wants to check the hardrive(C). After many 'file... is unreadable and checking sectors, security segments & USN journal, windows starts(most times, have had a few 'an unexpected error occured' & windows couldn't start). when trying to check hardrive in 'my computer' properties, then explorer error message ALWAYS appears. I CAN'T get into 'tools' to try 'fix file system errors' & 'scan for & attempt recovery of bad sectors' if ANYBODY can give me advice, would be MUCH appreciated!!