Bitcoin Core daemon running on a Windows 7 seems to be not supported with the following error:
C:\Users\User1>bitcoind -daemon
Error: -daemon is not supported on this operating system
Bitcoin Core daemon running on a Windows 7 seems to be not supported with the following error:
C:\Users\User1>bitcoind -daemon
Error: -daemon is not supported on this operating system
Yes, the concept of a daemon does not exist on windows.
There are system services, but dealing with those is fairly different from daemons in Unix.
Does it mean I am not able to access the JSON-RPC service for Bitcoin ?
How do I access JSON-RPC service on Windows ?
You do not need -daemon to access JSON-RPC. The option for that is -server, however that option is enabled by default for bitcoind (it is optional for bitcoin-qt). So in that regard you don't have to do anything special, it's exactly the same as on every other operating system.