stop happening vs. stop from happening

So, what is the difference between these two expressions:
stop something happening
stop something from happening

Many thanks,
Torsten[YSaerTTEW443543]

TOEIC short conversations: Customer returns cell phone to store because it doesn’t work.[YSaerTTEW443543]

Hi,Torsten!

I think there’s no significant difference between them. The preposition is optional here and is probably used in more formal situations. Am I right?

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To be honest, I don’t know if there is a difference and if so what it is.