There are so many of these files, which often have strange names, that some users are concerned that they may be viruses or other malware. Here's a good example of some as they look in Task Manager:

Source:https://www.howtogeek.com/358101/what-is-a-windows-system-file/
Here are some of the most common files, that are (usually) safe:
MRT.exe
rundll32.exe
explorer.exe
winlogon.exe
cmd.exe
conhost.exe
gwx.exe
csrss.exe
Chris Young
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