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Firefox blocks downloads - "This file is from a different computer"

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  • Last reply by techguy150

schwimmend-06.gelaender
schwimmend-06.gelaender
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I am trying to download a support app (FastViewer, "Fastclient.....exe) for getting support with an App I use for work. Problem is that the file I download does not open - both from firefox and from the downloads folder directly.

Long story short, I figured out that the file was blocked when opening its properties and seeing the message that "the file is from another computer", where I could also allow it.

What I tried: - Test with Chrome and Internet Explorer -> No issue - Clear Webpage data, cookies and caches -> Same issue - Refresh Firefox (https://support.mozilla.org/en-US/kb/refresh-firefox-reset-add-ons-and-settings) -> Same issue - Try opening the affected file from another User -> Same issue - Try in another user and on another PC with firefox -> No issue - Uninstall firefox, delete all folders in the Users AppData folder (Local, Roaming and LocalLow the "Mozilla" folder), then reinstall ->Same issue ( I did not import old Data back) - Checked security settings and settings in general but did not find anything. - I tried downloading any other files (paint.net, irfanview) and all of them worked without issue.


It cant be something that the webpage does, since it works in any other user and on any other PC I tested this, it is something specifically in this users Firefox Settings that is the issue.

Anybody any ideas?

I am trying to download a support app (FastViewer, "Fastclient.....exe) for getting support with an App I use for work. Problem is that the file I download does not open - both from firefox and from the downloads folder directly. Long story short, I figured out that the file was blocked when opening its properties and seeing the message that "the file is from another computer", where I could also allow it. What I tried: - Test with Chrome and Internet Explorer -> No issue - Clear Webpage data, cookies and caches -> Same issue - Refresh Firefox (https://support.mozilla.org/en-US/kb/refresh-firefox-reset-add-ons-and-settings) -> Same issue - Try opening the affected file from another User -> Same issue - Try in another user and on another PC with firefox -> No issue - Uninstall firefox, delete all folders in the Users AppData folder (Local, Roaming and LocalLow the "Mozilla" folder), then reinstall ->Same issue ( I did not import old Data back) - Checked security settings and settings in general but did not find anything. - I tried downloading any other files (paint.net, irfanview) and all of them worked without issue. It cant be something that the webpage does, since it works in any other user and on any other PC I tested this, it is something specifically in this users Firefox Settings that is the issue. Anybody any ideas?

All Replies (1)

techguy150
techguy150
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Firefox may block downloads and display the message "This file is from a different computer" if it believes that the downloaded file may be malicious or harmful. To fix this issue, you can try the following:

Disable the security software temporarily: Sometimes, the security software may interfere with the download and block it. You can try disabling the security software temporarily and see if it resolves the issue.