i did check that also today again. i just install a samsung nvme today again. and these appears. I a running Code XI 9900k and all my bios and drrivers are uptudate (asus motherboard website). I do also have the aisuite (last version)
ACPI Event 15 warning
The embedded controller (EC) returned data when none was requested. The BIOS might be trying to access the EC without synchronizing with the operating system. This data will be ignored. No further action is necessary; however, you should check with your computer manufacturer for an upgraded BIOS.
Also the nvidia driver is failing frequently .
Learn, Play Enjoy!