Unable to Install the Battle.net App

This is caused by a problem downloading or writing new update data. Try the following steps to resolve the issue:

1. Cached data in your modem and router can cause installation failures. Power cycle your connection hardware.
2. Run a security scan to remove any viruses or malware infections.
3. Update or Modify your security programs, which may mistakenly identify the login module as a security threat.
4. Try creating a new administrator account to resolve permissions issues.
5. Try closing background applications to resolve any software conflicts.

If the previous troubleshooting steps didn't resolve the problem, you can ask the Blizzard player community for help on the tech support forums (if available) or other community gaming sites. Local computer or network technicians may also be able to help if you've exhausted all other resources.