1. Download the software: https://www.ui.com/download/unifi/
  2. Close any instances of the UniFi software on the controller
  3. Open the command prompt as an Administrator
  4. Locate the java installation directory.
    On 32-bit machines, it’s usually found at “C:\Program Files (x86)\Java\<JAVA.VERSION>\bin”
    For 64-bit machines, “C:\Program Files\Java\<JAVA.VERSION>\bin”
  5. Add the dir above to the PATH (as seen under Computer->Properties->Advanced system settings)
  6. Change directory using the command cd "C:\Users\<USERNAME>\Ubiquiti UniFi"
  7. Type java -jar lib\ace.jar installsvc
  8. Set “UniFi Controller” service in services.msc to automatically restart after failures

Note:

# Example Windows command line to manually start the Unifi server app
&'C:\Program Files\Java\jre1.8.0_271\bin\java.exe' -Xmx1024M -jar "C:\users\$env:username\Ubiquiti UniFi\lib\ace.jar" start

 

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