Task/Services has high CPU, but how to find out what it is doing?

nearly daily some service is starting a task and never finishs. This task uses an entiry cpu core, which results in high fan activity.

Using ProcessExplorer I found out that it might be a service which is running and never stopping. But I simple can't figure out which service.

From ProcessExplorer it's said:

Command Line: taskhost.exe Time

And

Parent: services.exe(808)

Some help on figuring this out would really be appreciated.

(I already googled a lot, stopped services, looked through all services)

Some information:

• I'm not sure, but I think the problem is there since I bought the notebook (Dell XPS 12 Duo). Thought it was some Dell or Intel software and removed a lot of the preinstalled things
• Always had a antivirus software running (Antivir Premiun and now Kaspersky Pure)

After asking the question I've updated the following drivers/software, maybe one of them was the cause:

• Dell BIOS A04 -> A05
• Intel Dynamic Platform and Thermal Framework
• Intel Smart Connect

Update

Still have the issue 3 years.

What else I tried:

• Complete reinstallation, even used Windows 8 again -> still the same
• Using Snappy Driver Installer to really get latest drivers
• Used Linux for a while -> This works, so it is just some problem with Windows