The 777 Captain 1.5 features new anti-piracy code that might be false alerted  by some anitivirus software.
NOTE: OUR PRODUCTS (IF DOWNLOADED FROM CS UNALTERED) DO NOT CONTAIN ANY VIRUS, SPAMWARE, SPYWARE ETC CODE.

Your options:
A. Ignore the false alerts from your anitivirus software on the 777 Captain 1.5 code, install and enjoy the 1.5.
OR
B. Downgrade to the 777 Captain 1.4 - run csx772_1400.exe and follow the prompts to repair version 1.4.  If you no longer have the csx772_1400.exe file check-in to Your Profile, click Product name link and use Extended Download Service.

We are working on the issue to be fixed in 1.6.

We are sorry for inconvenience.