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WU_E_DM_WRONGBITSVERSION
WU_E_DM_WRONGBITSVERSION means that the Windows Update download manager could not use the installed Background Intelligent Transfer Service (BITS) version. BITS supports resumable background transfers and is used by Windows to download updates.
What to verify
- Confirm that the BITS service and the Windows Update components are present and healthy on the supported Windows version.
- Check the Windows Update log for the update type and any preceding component-version or servicing-stack error.
- Avoid replacing system files manually; resolve the platform or servicing incompatibility that prevented the required BITS capability.
Microsoft: Windows Update error reference
Microsoft: Background Intelligent Transfer Service (BITS)
Microsoft: Windows Update log files
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