I clicked on a video on one of the links here and got a pop up of windows security saying I was under attack by a virus. I knew better than to click on it and tried to close it with task manager: did not let me. Tried running mawlwarebytes and AVG, same results. Switched to a different profile on my computer(I have a business and personal profile) and was able to run AVG and Malwarebytes but they showed no infections. Went back to the infected profile and tried using the run command in Windows, wouldn't let me do it, still infected. Finally tried downloading malwarebyts to a flash drive from the uninfected profile and booting it on the infected profile: no go.
What gives? Any advice?