Try changing all the .exe files in your Silkroad Directory to Run in "Windows 98 / Windows ME". You can do this by right clicking each file and going to the compatibility tab.
You will need to do this to each of the 4 files.
If this does not work, im guessing this is something to do with your graphics card.
That skill might be putting stress on your card, and therefore crashes when you use it.
Try;
- Playing in a different resolution.
- Updating your graphics card (post here what you have and i'll find the correct drivers for you)
Hope this helps
