Hmm, if you haven't updated your Flash plugin yet today, it could have been the plugin notification icon. That usually looks like a small gray Lego block, but when your plugin version is known to be vulnerable to security exploits, it turns red and has a white circle in the middle. If you want to test this theory, you can visit Adobe's "about" page here and see whether the same icon appears: https://www.adobe.com/software/flash/about/ Adobe released an update today to resolve the critical issues it admitted were in the 18.0.0.203 version. You can get 18.0.0.209 on this page: https://www.adobe.com/products/flashplayer/distribution3.html In the first table, look for the row for "plugin-based browsers" and you can use either the EXE or the MSI installer. If it was some other icon, could you possibly capture a screen shot of it? This article has tips on that: [[How do I create a screenshot of my problem?]] Please cut or blur out any sensitive/confidential/personal information from the image before attaching it to a reply.