I know what false positives are and all that. I've been getting these messages (connected to C:\.jagex_cache_32) for the past few days. They're irritating, and as I was writing this a new one opened up.
In the picture it says 'nexus25.exe'. A Google search of it brought up nothing worth noting. However, the new one that opened up just thirty seconds ago was called 'nexus24.exe', and this is after I deleted nexus25.exe. All they've done as of right now is opened the command prompt and done nothing. I closed the command prompt before anything bad could happen...
The weird part is that this folder's icon doesn't exist. It isn't hidden, either - I had to type in the directory myself to find the files. It seems they're being created, and aren't residual browsercrap from when I played the browser game to which they're connected. I deleted everything in the folder for now, but I'm all suspicious now.
Besides this, every time I log in, my firewall says "Port Scan Attack Logged". When I back-trace it, it always stops at my router's IP.
My computer's freaking me out. Should I be concerned? I don't know if its weird 'not-a-folder' status is allowing it to avoid the AV until it tries to act up, or if it's connected to whoever is trying to find the open ports. I find this all very interesting, and if someone could give me the technical explanation for any or all of this I'd enjoy reading, but if I should be looking for specialists then I'd rather reformat.