Error code 923.

I keep getting error code 923. It says there's an issue with hard drive and to call 1-800-531-5000. Each time I've called, I've been told to reboot. It works okay for a few hours or a day or two. Then same error comes up. This has been going on for a month or more. I'm tired of calling and being told to reboot no matter how many times I've told them that rebooting only works temporarily.