So I have various desktops and all have more or less the same issue. In the root of each drive there are randomly named folders generated. Names like: 2b174a7b6cd269132e8dd780 52aebd6aec88ceb00badbc 32601669e81d70e5b9c7c8 ae888118d1365c5a165784ed221b20 So the only common thing seems to be that they are all hexadecimal, but even the lenght of the names are different. There is a minor difference in Win10: For Win 7/8/8.1 the folders are empty.On Win 10 the folders contain a folder called SandBox which is empty.The majority of the folders can be deleted without any issues, but some of them can't even with administrator rights. I spent the last two days on google but couldn't solve this. I read that many of the people thinks that this is due to Windows Update. If that was true why my non-system partitions, external hard drives, usb pendrives are also affected? I have to mention that all of my machines are affected regardless of their OS, location, user, etc. They run different anti-virus/anti-malware tools. None of them shows any sign of any infection. What the heck is that?