ok, so I have had my hp ze4525us for a couple of years, but it has been sitting around for about 2 years as it has not been working. I turned it on today and it says operating sysem not found, and also it says SMART predicted hard disk failure. What can I do about this. It won't boot up in safe mode, or any other mode, so do I have to replace the hard disk drive, and also, is this an easy job.
Any help will be greatly appreciated