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Windows boot error 0xc0000185 (I/O device error)

Windows boot error 0xc0000185 (I/O device error)

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The problem: Windows cannot boot due to an I/O device error when accessing the boot volume.

Symptoms: Boot screen shows 0xc0000185; may mention I/O error; boot loop.

Likely cause: Failing disk, loose cable/connection, controller issue, or corrupted boot files.

Category: Boot & Startup · Difficulty: Moderate · Windows: Both · Error code: 0xc0000185

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