<![CDATA[FILE_SECURITY_CHECK_FAILED Message on Extension installation]]>I tried installing an extension for the first time and it said Error: An error occurred when installing the extension: Download interrupted with reason: FILE_SECURITY_CHECK_FAILED

]]>https://forums.opera.com/topic/54212/file_security_check_failed-message-on-extension-installationRSS for NodeMon, 11 May 2026 04:00:08 GMTWed, 16 Feb 2022 21:34:29 GMT60<![CDATA[Reply to FILE_SECURITY_CHECK_FAILED Message on Extension installation on Mon, 21 Feb 2022 20:55:54 GMT]]>@apaeter Awesome!

]]>https://forums.opera.com/post/275045https://forums.opera.com/post/275045Mon, 21 Feb 2022 20:55:54 GMT<![CDATA[Reply to FILE_SECURITY_CHECK_FAILED Message on Extension installation on Mon, 21 Feb 2022 15:07:34 GMT]]>@burnout426 I followed the video, it worked! Thanks so much.

]]>https://forums.opera.com/post/275023https://forums.opera.com/post/275023Mon, 21 Feb 2022 15:07:34 GMT<![CDATA[Reply to FILE_SECURITY_CHECK_FAILED Message on Extension installation on Fri, 18 Feb 2022 21:33:42 GMT]]>I am doing the test now and I did restart my computer when the problem first showed, and it didn't fix the error.

]]>https://forums.opera.com/post/274781https://forums.opera.com/post/274781Fri, 18 Feb 2022 21:33:42 GMT<![CDATA[Reply to FILE_SECURITY_CHECK_FAILED Message on Extension installation on Fri, 18 Feb 2022 20:07:12 GMT]]>@apaeter Just to be clear, you tried the registry change that I linked to? https://www.youtube.com/watch?v=kAARgC9zSJ0 shows a visual of what to do. Make sure you restart your computer too.

But, it sounds like Windows Defender is not fully turned on or something.

]]>https://forums.opera.com/post/274776https://forums.opera.com/post/274776Fri, 18 Feb 2022 20:07:12 GMT<![CDATA[Reply to FILE_SECURITY_CHECK_FAILED Message on Extension installation on Fri, 18 Feb 2022 17:56:23 GMT]]>@burnout426 yeah, same problem, I can't download any files

]]>https://forums.opera.com/post/274770https://forums.opera.com/post/274770Fri, 18 Feb 2022 17:56:23 GMT<![CDATA[Reply to FILE_SECURITY_CHECK_FAILED Message on Extension installation on Fri, 18 Feb 2022 13:16:03 GMT]]>Do a test in a standalone installation. Same problem there?

Can you download other files?

]]>https://forums.opera.com/post/274751https://forums.opera.com/post/274751Fri, 18 Feb 2022 13:16:03 GMT<![CDATA[Reply to FILE_SECURITY_CHECK_FAILED Message on Extension installation on Thu, 17 Feb 2022 12:14:41 GMT]]>@burnout426 No. I tried disabling that but it didn't change anything. I checked its log too and the last time it blocked something was in 2018.
I don't have any other anti-virus enabled.

]]>https://forums.opera.com/post/274669https://forums.opera.com/post/274669Thu, 17 Feb 2022 12:14:41 GMT<![CDATA[Reply to FILE_SECURITY_CHECK_FAILED Message on Extension installation on Thu, 17 Feb 2022 08:28:53 GMT]]>@apaeter said in FILE_SECURITY_CHECK_FAILED Message on Extension installation:

My downloads are also not working. It says 'Virus Scan Failed'

Do you have Windows Defender disabled and no other anti-virus enabled? If so, see https://forums.opera.com/topic/47516/interrupted-virus-scan-failed.

]]>https://forums.opera.com/post/274660https://forums.opera.com/post/274660Thu, 17 Feb 2022 08:28:53 GMT<![CDATA[Reply to FILE_SECURITY_CHECK_FAILED Message on Extension installation on Thu, 17 Feb 2022 01:26:34 GMT]]>Oh wait, I checked downloading and its showing there. My downloads are also not working. It says 'Virus Scan Failed'
bc0502eb-a00d-417c-958b-eec150e21b47-image.png d25ef873-2016-4667-a80c-3b6785bf8d5e-image.png

]]>https://forums.opera.com/post/274643https://forums.opera.com/post/274643Thu, 17 Feb 2022 01:26:34 GMT