Is BOINC installed as a service?

Start-Up messages

To make sure BOINC is not installed as a service, you can check in the start-up messages whether it says it does or not.
Open BOINC Manager and simultaneously press CTRL+SHIFT+E to open the Event Log.

If you see messages as below, that means you have BOINC installed as a service.

01-01-1970 12:00 PM| | Starting BOINC client version 7.6.33 for windows_x86_64
01-01-1970 12:00 PM| | log flags: file_xfer, sched_ops, task, coproc_debug
01-01-1970 12:00 PM| | Libraries: libcurl/7.47.1 OpenSSL/1.0.2g zlib/1.2.8
01-01-1970 12:00 PM| | running as a daemon (GPU computing disabled)
01-01-1970 12:00 PM| | Data directory: C:\Programdata\BOINC\
01-01-1970 12:00 PM| | running under account boinc_master
01-01-1970 12:00 PM| | No usable GPUs found

Return to I have a GPU but BOINC doesn't see it.