Exactly the same problem here on two different machines, one using Steam and the other using Origin. Tried to apply the registry fix but the path stops at HKEY_LOCAL_MACHINE\SOFTWARE\WOW6432Node\Electronic Arts\Electronic Arts\Red Alert 3\ with only the following entries:
(Default)
Install Dir
Language
----- C&C:Online Launcher Start -----
Game: Red Alert 3
Red Alert 3 Install Path: C:\Program Files (x86)\Origin Games\Red Alert 3\
Started game with: "RA3.exe "
Caught CREATE_PROCESS_DEBUG_EVENT from Red Alert 3. Detaching...
Found game.dat process. PID 13512
*** Starting CA public key patching routine ***
CA public key is expected value.
Successfully patched CA public key.
*** Starting hostname hooking routine ***
Injecting DLL into game.dat process...
Result of injection: Code -1073741582
Game: Red Alert 3
Red Alert 3 Install Path: C:\Program Files (x86)\Origin Games\Red Alert 3\
Started game with: "RA3.exe "
Caught CREATE_PROCESS_DEBUG_EVENT from Red Alert 3. Detaching...
Found game.dat process. PID 13512
*** Starting CA public key patching routine ***
CA public key is expected value.
Successfully patched CA public key.
*** Starting hostname hooking routine ***
Injecting DLL into game.dat process...
Result of injection: Code -1073741582
----- C&C:Online Launcher Start -----
Game: Red Alert 3
Red Alert 3 Install Path: C:\Program Files (x86)\Origin Games\Red Alert 3\
Started game with: "RA3.exe "
Caught CREATE_PROCESS_DEBUG_EVENT from Red Alert 3. Detaching...
ERROR: game.dat process not found.
----- C&C:Online Launcher Start -----
Game: Red Alert 3
Red Alert 3 Install Path: C:\Program Files (x86)\Origin Games\Red Alert 3\
Started game with: "RA3.exe "
Caught CREATE_PROCESS_DEBUG_EVENT from Red Alert 3. Detaching...
Found game.dat process. PID 1351210740
*** Starting CA public key patching routine ***
CA public key is expected value.
Successfully patched CA public key.
*** Starting hostname hooking routine ***
Injecting DLL into game.dat process...
Result of injection: Code -1073741582
----- C&C:Online Launcher Start -----
Game: Red Alert 3
Red Alert 3 Install Path: C:\Program Files (x86)\Origin Games\Red Alert 3\
Started game with: "RA3.exe "
Caught CREATE_PROCESS_DEBUG_EVENT from Red Alert 3. Detaching...
Found game.dat process. PID 135121074011316
*** Starting CA public key patching routine ***
CA public key is expected value.
Successfully patched CA public key.
*** Starting hostname hooking routine ***
Injecting DLL into game.dat process...
Result of injection: Code -1073741582
----- C&C:Online Launcher Start -----
Game: Red Alert 3
Red Alert 3 Install Path: C:\Program Files (x86)\Origin Games\Red Alert 3\
Started game with: "RA3.exe "
Caught CREATE_PROCESS_DEBUG_EVENT from Red Alert 3. Detaching...
Found game.dat process. PID 1351210740113168200
*** Starting CA public key patching routine ***
CA public key is expected value.
Successfully patched CA public key.
*** Starting hostname hooking routine ***
Injecting DLL into game.dat process...
Result of injection: Code -1073741582
----- C&C:Online Launcher Start -----
Game: Red Alert 3
Red Alert 3 Install Path: C:\Program Files (x86)\Origin Games\Red Alert 3\
Started game with: "RA3.exe "
Caught CREATE_PROCESS_DEBUG_EVENT from Red Alert 3. Detaching...
Found game.dat process. PID 135121074011316820010744
*** Starting CA public key patching routine ***
CA public key is expected value.
Successfully patched CA public key.
*** Starting hostname hooking routine ***
Injecting DLL into game.dat process...
Result of injection: Code -1073741582