Tried opening task manager and seeing which program(s) are active? Also, typing msconfig in the search bar and seeing what startup programs can be unchecked?
I have to end the process for AppleMobileDevices, the git uses 25% of my CPU and if i don't end the process it causes FPS problems. Apple have been called up about it, but they do absolutely **** all to rectify it.
Edit: Make an exception in your Anti-Virus and also check to see if any updates are ongoing too.
Do you happen to have any TP link software installed?
You know, I never thought to check the evenvwr, so will look now!
You didn't mention the eventvwr?