Cossacks 3 Message Board  

Please disable/uninstall all antivirus, firewall and other security software including browser addons and extensions. Right click "Run as Administrator" on trainer and game. Please note that some security products may still block access to trainer injection even when disabled and must be completely uninstalled. If this is the case, please contact the product vendor for instruction on the proper way to prevent the trainers from being blocked by their software or find a better alternative.

or

Extract trainer and make sure trainer/launcher/editor is in a folder excluded from virus scans. Empty quarantine folder if needed or set anything trainer related (paths and EXE's) to ALLOW. Disable any Live/Active/Real-Time tools which may trigger false positives in security software that may terminate the game/trainer when it's activated or options used.

C:\Users\USERNAMEHERE\Cheathappens

may need to be added to exclusions as well. Click and select "Run as Administrator", read the instructions and try again.

Make sure game version and trainer version match and that you purchased the game from the supported distribution site. Right click run as admin on trainer. Run game. Get into game. Alt tab to trainer and press F1 to activate. Alt tab to game and use options. If still not working then something is blocking it or you have a completely different version of the game and you can upload your game exe for evaluation.