I have been having trouble with my Chrome browser. It seems every website I go to I have a black box come up while page is loading when I click the "x" it opens another tab. I close that tab then I have to keep exiting out of warnings coming up. For a while it kept saying I had a virus and to call Microsoft at the number given. Now it says I have a trojan and to call Microsoft at the number provided. I keep exiting off these messages until the box comes up to check that says prevent this dialog from making additional messages. I have ran my antivirus and it comes back secure saying I have no virus, trojan, or spyware installed. Anyone have a clue about what is going on?