본 사이트는 여러분의 사용자 경험을 개선하기 위해 유지 보수를 진행하는 동안 기능이 제한됩니다. 도움말로 문제가 해결되지 않고 질문을 하고 싶다면 Twitter의 @FirefoxSupport 및 Reddit의 /r/firefox 채널을 활용하세요.

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고객 지원 사기를 피하세요. 저희는 여러분께 절대로 전화를 걸거나 문자를 보내거나 개인 정보를 공유하도록 요청하지 않습니다. "악용 사례 신고"옵션을 사용하여 의심스러운 활동을 신고해 주세요.

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What does "The download cannot be saved because an unknown error occurred" mean?

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I've received this message on my computer, "Looks like you're using an older version of Firefox." Free download. Click. When I click, a box appears with this message: "Firefox Setup Stub 35.0 exe. Would you like to save this file?" Options are "save file" or "cancel." When I hit "save file", the message is "The download cannot be saved because an unknown error occurred." Can you help me figure out how to proceed with upgrading Firefox Mozilla? Thank you.

I've received this message on my computer, "Looks like you're using an older version of Firefox." Free download. Click. When I click, a box appears with this message: "Firefox Setup Stub 35.0 exe. Would you like to save this file?" Options are "save file" or "cancel." When I hit "save file", the message is "The download cannot be saved because an unknown error occurred." Can you help me figure out how to proceed with upgrading Firefox Mozilla? Thank you.

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You can use Internet Explorer to download Firefox. Click the Start button, type Internet Explorer to begin searching for Internet Explorer, and click the first search result to open it. You can then visit https://www.mozilla.org/en-us/firefox/new to download Firefox.

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It is possible that anti-virus software is corrupting downloaded files or is interfering otherwise.

Try to disable the real-time (live) scanning of files in your anti-virus software temporarily to see if that makes downloading work.

Try to download the full installer instead of the stub:

Boot the computer in Windows Safe Mode with network support (press F8 on the boot screen) as a test.

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Your settings might be corrupt, too, so if Cor-el's suggestions don't work, then reset your settings.