I don't see anything in your autoruns files that stands out as questionable.
I assume that you've run Defender/MRT/Malwarebytes scans and nothing was detected.
Download and run process Monitor.
https://learn.microsoft.com/en-us/sysinternals/downloads/procmon
In the Filter menu add an include entry for process name is cmd.exe.
Trace the issue and look for the process. Double click on an entry. Does the command line entry point to some .bat file? What's in that file?
Note the parent PID. That will help you find out how/what launched cmd.exe. Use the task manager to find that PID.