I used the HP PC Hardware Diagnostics UEFI just now and ran a system test and a test of the hard drive, but it found no problems. However, shortly after I wrote the original post, I noticed a post at the top of this board explaining how to find your hard drive manufacturer and if they have any specialist software. I found that mine is manufactured by Seagate and downloaded SeaTools which found problems. I am now planning to use SeaTools to attempt to solve the problem.
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