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If there is an issue with Nokia device hardware, it should always be taken to Nokia Care point. Where they can assist you further with your hard drive issue and any other issues that you may be having.
Also, providing a proof of purchase would be handy in case any repair is needed.
I has a similar issue but it was to do with some sort of malware that kept opening programs until the CPU surrendered after a few minutes and locked up the booklet.
As the HDD is so poor anyway I have taken the opportunity to install an SSD, which is a delight and overcomes a lot of the little frustrations I had with the machine.