What should I do when a square pops says I won a free wii?

if you can, report it to someone because its a scam there are lots of stupid scams like those were greedy, disgusting people from all over the world set them up to take your money there are many of those horrible scams that are sent by e-mail and over the phone too telling you bull like youve won a lottery or a free holiday what they want from you is your personal details and usually bank account details (for the delivery fee or whatever bullsh*t they say) so they can get into your account and take all of your money

giving them your details will allow them to hack into your accounts and steal your money, using it for other criminal related things. they can also pass on your details to other scam sites

so press the delete or close button when one of those things pops up, because they are 100% a scam the only thing you will get from them is into debt