I've found that from certain types of websites they won't copy... but most places I pick from copy/paste and use are allowed freely. I right click on the pic I want, and copy... but yes from time to time I have to use the link and the photo box

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Sometimes I think the picture may display small but when I try to copy it, it's larger than life and I have to not use it. Not sure what's up with that. (I mean, I know PC has pixel limits, but usually it just skews the page so I know instantly that it "ain't gonna work"... but yeah I have the most trouble trying to put up pics into my social group SOUL FOOD. )
If you keep having issues, let me know, I enjoy a good challenge