I believe I have the same thing that was remedied in this post -- https://www.techspot.com/community/topics/sponsorship-virus.194777/ But to give you a summary...computer was working fine, then all of a sudden (a couple months ago) I would get a new window if I didn't have the browser open or a new tab in my browser with this "sponsorship" window. I primarily use Chrome and only started using other browsers when this occurred. When I uninstalled Chrome and used Firefox instead...the window would still pop up in Firefox. I only bring this up because I don't want to exclude any browsers and not get rid of the issue. Because once I saw it on Firefox also, I then tried using Internet Explorer (ugh), and it also did the same thing. I have noticed that it happens a lot when I "wake" my computer from sleep. I have tried running Malwarebytes and SpyBot and deleted any threats (as suggested). However, none of the scans that I have run have ever come up with anything called "sponsorship." I am currently running the ESET online scanner. Again, this has been going on for a couple months, but now it has really affected my computer. This week is when I noticed the speed decrease drastically. I have Verizon FIOS and we have 50/25 speed. When I do a speed test at speakeasy.net I am getting 8 Mbps down and 19 Mbps up, and that's crazy.. I saw on the post referenced above not to follow certain actions, since it was specific to the poster...so here I am creating my own thread to try and fix the disease my laptop has. Thank you in advance for looking at my post and any input that you provide!!