If your game crash when hitting ''Play Game'', try this.

Go to: SD EnterNET/NavyFIELD/HSield/Update - Delete the folder ''Patch''
(Best it's only that folder and not the entire Update folder)
Run: SD EnterNET/NavyFIELD/HSield/HSUpdate.exe (*)(**)
(It should update. The bar might stay stuck a few seconds, but then move all the way.)

Run the NF Launcher. The game might crash at startup but give it a few seconds and then boot up again.(***)

(*) Before deletion there might be alot of files in: SD EnterNET/NavyFIELD/HSield/Update/Patch/39/ folder. If it is updating correctly there should only be a ''ahn.ui'' file on around 2kb.
(**) If it fails to update: Try doing a pathping to: 125.141.243.158. If it wont finish over several attemps, try contacting your ISP and have them look at it.(If your parents pays for the internet, let them do the contact.)
(***) If it continues to crash: Do a reinstall (and remember to delete all related NF files/folders) and update the game. It will download 40+ files. Start the game and it might crash again, but fear not. Wait a few seconds and Launch again. Now it will download 30+ files and when done, hit start again. (If it still crash, do the above process again and it should work fine.)

((You might need to remove all ''Disable Visual Themes'' And so on. Still need to run as Admin. though.))

When you try updating HS:
>>Please make sure that you dont have PeerBlock or other programs like it running. It will block access to HS.<< >>Check and see if HS has full access trough your firewall. It might not have been able to create a exception or it have been deleted for various of reasons.<< >>Be absolute sure of that you run as Admin. even though you run on Admin. account.<<

I hope that it might help you as it helped me.