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WU_E_DRV_REG_MISMATCH
WU_E_DRV_REG_MISMATCH means a registry value consulted for driver applicability or installation has the wrong data type. It does not automatically mean that the entire registry is corrupt.
What to do safely
- Use the log to identify the affected device or driver before changing anything.
- Compare the relevant driver installation state with a working system only when the driver and Windows version match.
- Use supported driver repair or reinstallation methods; avoid broad registry cleanup tools that can remove unrelated device configuration.
Microsoft: Device and Driver Installation
Microsoft: Windows Update log files
Microsoft: Windows Update error reference
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