Hello, Google Chrome started acting strangely today (saying common sites - Facebook etc. - did not have strong enough security signatures) - shortly after Microsoft Security Essentials appeared to turn itself off and would not be turned back on and shortly after that, my PC restarted and now on restarting I receive the error 'Windows has encountered a critical problem and will restart automatically in one minute. Please save your work now.' This occurs in Safe Mode as well, although it appears to take longer to restart inm Safe Mode. I do not have time to run Malawarebytes or Spybot Search & Destroy before it restarts. I am running Windows Vista. Having noted other responses, I will follow this post with the Farbar scan results. Any help you can provide is much appreciated - thank you.