If you suspect your hard drive might be at fault, read How to Check Your Hard Drive for Errors for practical advice on how to make sure things are still good to go. That’s especially true of mechanical hard drives, which are more prone to failure than modern solid-state drives (SSDs). Repeated MBR corruption can also be the result of a failing hard drive. If your computer has turned off every time you’ve come back to it you may want to consider buying an Uninterruptible Power Supply (UPS) to counter poor electricity services.
If you’re using a mechanical drive, MBR corruption can be the result of improper power cycling. If you’re facing repeated corruption issues with your MBR, you’ll need to start looking for a culprit. If you don’t have suitable, bootable Windows 10 media and want to know how to create it yourself, have a look at How to Create a Windows 10 Bootable USB Recovery Drive. You can also choose Command Prompt under Troubleshoot > Advanced Options and then use the same instructions to fix the MBR via the Command Prompt mentioned above. Once you select repair, you’ll have the same Troubleshoot option as detailed above.
