Even after uninstalling it so that it won't sync to the cloud you still have a local Ondrive folder in your user profile and some scheduled tasks for it including a Startup task.
CCleaner Performance Optimise can put those scheduled tasks to sleep for you.
Here's mine in Task Manage'rs Startup tab, Onedrive was uninstalled long ago, the startup task is still there but I knew about it and disabled it myself - CCleaner just does that disabling for you (if you tell it to).