I have this strange problem going on with my computer: once a week my browser, google chrome, redirects to a random page. Sometimes it's a "your computer has a virus on it" page, and sometimes it's a "install the latest updates to flash that we are downloading for you right now without your permission" page. It only seems to happen on certain pages (deviantart, tumblr, etc.) and only if I leave that page up on my tab and leave it idle for an amount of time. I keep using various scans and they all come up empty (except for RogueKiller, but that's apparently a false positive). Is there something going on with my computer or do I just have some bad luck when it comes to browsing the web?