you need to update your software
especially because you have a new computer. The new computer's software is only updated up to the point it was installed on your computer, and not current. They are always updating software to make it run more efficiently, security fixes, bug fixes. So in order to see alot of content, you need to keep up. Flash is always updating and is used to view videos and animation, so that is a likely culprit to update. (BTW, I have minimal knowledge, so could be wrong and don't mind being corrected)
I needed to do all of it when I got my new laptop. Updating browser is not the same as 'refreshing' your windows. Your browser is maybe, Windows Explorer or Firefox or something else, and all it's updates need to be done.
Sometimes Windows updates just downloads the updates. You may have to go and tell it to
install it. So check that too.