canadian.quarterβ If, for any reason, you want to stop this running on startup, and in memory, you need to Stop the OVRServices (Oculus VR Runtime Services). This has nothing to do with your windows startup options btw.
You can find this using your windows task manager/services and scroll down to it. You can right click on it and select Stop. This will stop it working in the background and should clear it from your memory.
However, next time you restart your PC it will be active again. This is because its set to automatically startup. To change this you need to right click on it and drill down to services, then scroll down to find it again. then right click on it and select properties. Follow this and change the Auto startup to Manual (then Stop if you haven't already done this). After some, but not all, meta-link pc updates (esp if you run a meta-link Repair, or reinstall its drivers) you may need to redo this.
Once this is set to Manual, it will not startup after PC resets. You will then need to manually restart it in order to use the meta-link pc app (if you are using SteamLink or Virtual Desktop you probably don't need to do this). To restart OVRServices again go into windows taskbar Services, scroll down to it, right click, and select Start. Afterwards, if you want to stop it you'll need to again do this manually.
If you Google 'how to turn on and off Oculus Runtime Services' you find bat files that you can use to turn this Service on and off. Personally, I use the Oculus Tray Tool to do this, but this app is no longer supported, and not all that user friendly, so maybe not for you (bat files work fine). I only use an option to turn on/off OVRServices because I also still use a Vive Pro headset and turning this off helps make sure that SteamVR doesn't try to startup up the meta-link app when I don't want it to.
TBH if I only used Meta headsets (I have a QPro and Q3) I don't think I'd bother with doing any of this. Having OVRServices running in the background doesn't use any significant resources imho. All it does is check that your meta-link app is up to date.
Anyway, hope this helps. Good luck mate and cheers.