Hi, I am not quite sure if it is really a virus/malware, coz apart from that minor problem, everything works fine on my computer. Earlier today, when I was watching a video on Youtube, a small window that was never seen before popped up, saying something like "Please take part in a survey". Of course I simply closed it. Then, when I went to Youtube again just now, the following problem comes up: Everything works fine on the page, until I clicked on a video link. The IE window closed all in a sudden without any error message. I tried to click on other links on Youtube, like user profiles, they all worked well. Yet all the video links fail, they simply close my browser at once. I also tried some other video pages, they just worked fine. Is there anything I can do to regain the access to Youtube video pages? I am using IE7. Thanks in advance.