I knew someone in mining and we put up foil with vinegar to make it stick, but it's not really practical for that desk being in the way... we put up one of the foils on the outside and that still seems to be mostly intact. We have something locally available called contact paper which seems very much like what you're talking about, at least from what I saw on amazon.

It's heavy and doesn't tend to stick, I had thick plastic like a trash bag only thicker, but nobody knows where to get it anymore.

Not in north america, can you put that on the outside of the window?

The window that is causing trouble is up pretty high, I'd probably need scaffolding to do it, and putting it on the inside isn't an option. The foil I've put up on the outside has actually held up fairly well with storms and things like that.

Can you see an issue with this, apart from being an eyesore? The crt monitor on the left is anchoring the cardboard on the left, and the wood is there to make all the cardboard stand up straight. But I had to wedge a couple of things between the monitor and wood. I have cinder blocks at the bottom of the right hand cardboard, with the imac further jamming the wood via cinder block behind it. https://imgur.com/a/7A6jtoj

Can you see an issue with this, apart from being an eyesore? The crt monitor on the left is anchoring the cardboard on the left, and the wood is there to make all the cardboard stand up straight. But I had to wedge a couple of things between the monitor and wood. I have cinder blocks at the bottom of the right hand cardboard, with the imac further jamming the wood via cinder block behind it. https://imgur.com/a/7A6jtoj