Tag Archives: 0x80070643

FIX: Definition Update for Windows Defender Fails with Error 0x80070643

When installing updates for their computers from Windows Update, many users have reported a single update – a Definition Update for Windows Defender – failing, with the error code 0x80070643 being associated with the issue. Definition Updates for Windows Defender come with new and updated definitions for all known viruses …

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Fix: Errors 0x80070643 and 0x8004ff82

This error is usually a result of left-overs files, registry entries and firewall settings from a previous anti-virus protection software. Unfortunately, it is a bit difficult for a new bie to trace the left-overs of anti-virus softwares, which is the reason why “i am writing” this guide – it will …

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