Hello,
This particular subprocess acting up is often an indicator of a virus. Reinstallation of windows is usually enough to clean this out. Unfortunately, if the problem is persisting through a reinstall, you may have to end up formatting your drive or searching for additional solutions to the problem. I would suggest doing a thorough search on the kinds of viruses and issues that can last through a reinstall of windows and how to get rid of them. Hopefully this helps. :(