Brand new pc? Several things to try.
Look here:
viewtopic.php?f=3&t=46899First, since it's an 8400GS, try turning down the graphics option BEFORE you get into the game, use the lowest settings and see if that helps. If so, make small changes to the settings until the game fails, then revert whatever you JUST changed back to what it was.
If not, see this thread:
viewtopic.php?t=34702Try Solution # 1 to Problem # 2 - that is editing the hosts file, as the lack of a Start button usually means your PC can't connect to the silkroadonline.net website, OR - open a browser and open the
http://www.silkroadonline.net website, make sure it's on the screen first.
If that doesn't work, also try Solution # 2 to problem # 4 (the C9 error).
Keep looking through the technical support forums here, other people may have resolved that problem in a different way that works for your PC.