AdobeFlashPlayerUpdateSvc is the Background Update service, it's not for Notification Update, which is what appears to be the notification that you are getting. Disabling this has no bearing on Notification Update Setting
To disable notification updates do one of the following:
Disable via Flash Player Settings Manager:
- Control Panel\All Control Panel Items > Flash Player (32-bit)
- When Flash Player Settings Manager launches, go to Updates tab
- Select option to Never check for updates (not recommended)
In an enterprise setting, deploy a custom mms.cfg file with the following settings:
AutoUpdateDisable=1
SilentAutoUpdateEnable=0
mms.cfg file is saved at:
32-bit OS: C:\Windows\System32\Macromed\Flash
64-bit OS: C:\Windows\SysWOW64\Macromed\Flash