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rmere2017

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  1. Hi, thank you both for your responses. The flashing of the screen does happen both with and without the external monitor plugged in, but it sounds like it could be an internal hardware issue since the infected website would not have impacted my Mac. I didn't send it on to my friend, so we should be clear. I appreciate your time in looking into my inquiry and for the detailed responses.
  2. I have a Mac running OS X 10.12.6 and was trying to help a friend with his Windows machine. He has a legitimate version of MS Office, but needed to reinstall it and couldn't find his product key, so I tried helping him get his installation activated. I ended up on https://freemicrosofttoolkit.com/ and tried downloading from one of the mirror links. This was on my Mac using Chrome, but when the download finished, Chrome said it detected a malicious file in the download and removed it. Since the download was removed, I didn't unzip or execute anything that was downloaded, but since then, I've been noticing some strange behavior, with some programs freezing up, and most notably, I periodically see my entire screen flash briefly like a screenshot is being taken. If I'm plugged into an external monitor, both screens flash simultaneously. It doesn't seem to be on a set schedule (e.g. every 60 seconds), but it happens periodically. I downloaded Malwarebytes and ran a scan that came up clean, but I'm still suspicious that something is lurking in the background. What other scans or steps should I take to look into this? Thanks in advance for any assistance.
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