Hi Peet,
I'll try to instruct you regarding to running as a process.
1. go to the windows services window and disable Performance Center agent service
2. Go to the start menu you'll find under Performance Center, Performance Center agent process
3. Make it will be in your startup folder
Now regarding the service user (if going the service way) try to make sure MDRV is running as IUSR_METRO user.
Thanks.