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strange message keeps popping up

I keep getting this message on my iMac and have no idea why. Can someone help me, please


This page isn’t working

read.qualitychecker.net sent an invalid response.ERR_INVALID_REDIRECT

iMac 27″, macOS 10.13

Posted on Oct 31, 2021 11:36 AM

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Question marked as Top-ranking reply

Posted on Oct 31, 2021 11:42 AM

Try restarting in Safe Mode per https://support.apple.com/guide/mac-help/start-up-your-mac-in-safe-mode-mh21245/mac and then restart normally and retest.


if that does not help download malwarebytes and run it.

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strange message keeps popping up

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