HKCU registry and the start up application which one will ready first

Question

Hello guys, here is my question. When create a new user in windows8.1, and I write a service to launch my appA to do something.
and my appA will read the registry at HKCU, but failed! Then I restart appA, read the registry again, it success!  I guess when the new user was created the appA was launched before the HKCU ready. Is it true？ 

Answer 1

Hi Henry,
It might be a permission issue. Windows services execute under different account which compare with desktop app. They are the following.
LocalSystem,
https://msdn.microsoft.com/en-us/library/windows/desktop/ms684190(v=vs.85).aspx
NetworkService,
https://msdn.microsoft.com/en-us/library/windows/desktop/ms684272(v=vs.85).aspx
LocalSerivce,
https://msdn.microsoft.com/en-us/library/windows/desktop/ms684188(v=vs.85).aspx
Please add log handler in appA to see the failure in details.
Regards,
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