find any item in the list

[snippsat]

Doesn't may example not do what you explain?
Let take you list and run on my system now.

>>> pro_find = ["opera.exe" , "chrome.exe" , "iexplore.exe" , "firefox.exe" , "microsoftedgecp.exe"] 
>>> p = set(pro_find) & set(process_list)
>>> p
{'chrome.exe'} 

So it find that i have Chrome running,and none of the other is running.
If i start FireFox.

>>> p = set(pro_find) & set(process_list)
>>> p
{'firefox.exe', 'chrome.exe'}

What's not running.

>>> p = set(pro_find) - set(process_list)
>>> p
{'opera.exe', 'microsoftedgecp.exe', 'iexplore.exe'}