Normal
You appear to have a ton of entries in your database of movies that lack an IMDb tt-ID, so the artwork nodes are going crazy trying to find missing images. If you manually add a cover via MovPic config these background tasks will stop, which should hopefully clear up your problem. Also check into your LAN driver/BIOS, as I have seen many bad configurations that have excessive CPU usage for the LAN driver, especially certain RealTek drivers are notorious. Be sure to download the latest driver from the manufactor website and do not rely on WHQL ones.