I am using Windows 8 and have been using Google Chrome for about 6 months now. Today it started playing up and now it wont launch at all. I have tried various internet suggestions such as typing no-sandbox in the 'properties' dialogue box in the target tab and tried fixing it with Windows own troubleshooter but still nothing. It doesn't even give a screen with the Chrome logo on it when I launch it - I just get a blue screen. Any ideas - I want my bookmarks.... thanks