Does anyone know if there exists a way to block adult content (not

You need to get a filter.

But just so you know, it doesn't necessarily block ads.

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on internet explorer click on tools, at the bottom there is internet options, open it, at the top there is a tab called content, click and at the top of that window there is a content advisor, click enable and then you be given a list of adult content that can be seen, I.E. porn gambling etc. and then click one and use the slider on the bottom to adjust which users can view such material. As far as youtube goes, you are required to sign in and verify your age before you view such adult content.