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My CNBJ2530.DPB system file is corrupted. What are my options for repairing my Windows installation? Is there a way I can replace or repair just this file? I don't have an alternative Windows 8.1 source at home.

Excellll
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This is a known issue under Windows 8 and Windows 8.1 which I reported to Microsoft some time ago. They investigated it, found it internally but have no idea what causes it.

To fix the issue, open a command prompt as admin and run the following DISM command:

DISM /Online /Cleanup-Image /RestoreHealth

This command downloads proper files from Microsoft servers and replaces the corrupted file on the disk with a good file.