This means something on your PC is stopping the BattlEye service from installing, usually antivirus or a permissions problem. Clearing it lets the service install. Jump to your situation below or work through the methods in order.
The Failed to install BattlEye Service error, including the variant (4, 50000005), means something on your system is blocking BattlEye from installing its service, which is required to play on BattlEye-enabled games like PUBG, Rainbow Six Siege and DayZ. The usual causes are antivirus blocking BEService.exe/BEService_x64.exe or the BattlEye Service folder, a permission problem with that folder, or corrupted BattlEye files. The fixes are, in order: add exceptions in your security software for the two BEService executables and the BattlEye Service directory (C:\Program Files (x86)\Common Files\BattlEye), delete that BattlEye Service directory so the game rebuilds it cleanly on the next launch, run the game's BattlEye launcher (the _BE executable) as administrator so it can request the rights to install the service, and if needed install BattlEye manually by running install_BattlEye.bat and verifying your game files. Because this is an install or permission block rather than a ban, clearing it gets you playing.
BattlEye installs a Windows service the first time you launch a BattlEye-enabled game. This error means that install failed, almost always because antivirus is blocking the BEService files or the BattlEye folder, or because the launcher could not get the permissions it needs.
Clearing the block fixes it: add antivirus exceptions for BEService and the BattlEye directory, delete that directory so it rebuilds, and run the game's BattlEye launcher as administrator. A manual install and a game-file verification cover corrupted files.
“Failed to install BattlEye Service, especially the 50000005 one, is nearly always antivirus or permissions. So I add BEService.exe and BEService_x64.exe and the whole BattlEye folder to the antivirus exceptions, then delete that folder so the game rebuilds it fresh on next launch. If it still will not install, I run the game's own _BE launcher as administrator, because it has to request rights to install the service. Manual install with install_BattlEye.bat and a file verify is the backstop for corrupted files.”
BEService.exe and BEService_x64.exe (in your game's BattlEye folder) and the whole BattlEye Service directory to your antivirus and firewall exceptions.C:\Program Files (x86)\Common Files\BattlEye.C:\Program Files (x86)\Common Files\BattlEye.install_BattlEye.bat to install the service manually.Failed to install BattlEye Service (including 4, 50000005) means antivirus or a permission problem is blocking the install. Add BEService.exe/BEService_x64.exe and the BattlEye directory to antivirus exceptions, delete the BattlEye Service directory so it rebuilds, run the game's _BE launcher as administrator, and install manually with install_BattlEye.bat if needed.
If the service still will not install after exceptions, a delete, admin and manual install, a corrupted Windows service configuration is likely; running sfc /scannow and reinstalling the game restores it. You can also submit your error to us for a tailored fix.