Sometimes Windows Defender just does not work. I found a better solution. The solution consists of a pint of water and a few drops of washing up liquid, lavender oil and peppermint oil. Sprayed around the observatory, into all the unused sectors, the trojans are repulsed and my observatory is spider and web free. Furthermore, SGP smells sweetly too.
Anything to help with W10 gremlins and spiders (especially for my daughter!)
I find a regular intake of G&Ts very calming too, helps gain a proper perspective on life 
Unfortunately I can’t do this or I’d have to change the name of my observatory. Spiderhaven Observatory just wouldn’t seem right anymore. 
Jared
I think spiders must have solved the teleportation problem, that’s the only way I can figure they get inside my OT and spin their little webs.
BobT