I have this strange behavior of the (Windows) Explorer.exe, which uses straight after I lock in with my M$-Live-Account into Windows-8.1, ~13% CPU-Load and randomly changes the Cores which get used up to 100%. This behavior seems to be totally random and sometimes it can be fixed with a restart of the explorer.exe / Log-out / reset / PC turn off, but sometimes it takes 10 times to get rid of it. Maintenance is not in progress when it happens and it seems not to come back, when you keep the system up and running, after it got "fixed". I couldn't find any answers via google and wonder if it is normal, a Windows-8.1-Bug or maybe 3rd-Party-Software-related ? Process-Explorer doesn't show me more info's either.