I am obviously having disk problems on my HP which is about a year old. The windows 8.1 event log shows many many disk block errors. Running DSKCHK shows no problems. I read in a forum that Norton Disk Doctor did a better job and so I just bought it. But nope, it shows no disk problems while the event log shows disk block errors at the exact time disk doctor was running. So what gives? If I really have a 30 day trial I might as well send this back because it is pretty worthless. It apparently is just a pretty front end for dskchk.