When I start it it comes up as a small square sized window and I can't see the full game because a part of the game window is cut off and not visible for me. How do I solve this?

Dear Player,

This may be caused by registry values being set incorrectly for CSN:Z.
If you are affected, please download the following ZIP file;
http://csnzimage.nexoneu.com/client/CSNZ_REGISTRY_INIT.zip

Shut down CSN:Z if it is open, and run the registry-file within the Zip. Please exercise great caution when making changes to your system's registry! Do not make additional changes to your system's registry as you can make your computer inoperable if not careful.