Sudden CPU load in idle, is it a virus?

Question

Windows

Good day! I found a problem on my computer when cleaning it and replacing the thermal paste.
Everything seems to be fine, the temperature does not rise, all things ... But I have the Core Temp utility installed on the wheelbarrow, which helps to monitor the temperature and frequency during rendering, debugging, etc.
Having started the computer after cleaning, I suddenly discovered the news that from 39 ° the temperature rises to 40-47 ° and drops sharply, turning back to its previous value.
Having disabled all unnecessary programs in autorun in advance, restarting the wheelbarrow, I decided to look at the chronology in the Task Manager, which showed sharp jumps in the processor load ...

After that, I decided to go into Windows Safe Mode to see what happens in a "clean" start, is there such a thing - The answer is no...

Again I went into the car in the usual, folk way and looked at the processes (I didn’t get it at first when I looked at the chronology) and saw the suspicious activity of dllhost.exe / Lutloader.exe and some other processes that abruptly opened and ended ...
The question is lamer, but how to deal with is this or can only be put up with? ..
Thank you in advance!

Answer 1

Most likely, this is a virus that, when the manager and other programs for viewing running processes on a PC are launched, immediately closes, and then starts.
In safe mode, you can delete it with due skill.
But we are talking about Windows, you can always reinstall it :)
Which is what I advise you to do, by the way, I do not advise you to leave any executable files from the old system - because the virus could infect it, or some of your programs are a virus.
And immediately after reinstalling, make a backup when you download all the necessary software and understand that everything works well.

Answer 2

Windows 10 runs a bunch of idle background maintenance tasks. The same is true for software - updates and so on, maybe malicious software.
Monitor the load, see what processes.