I was using Sandboxie and Shadow Defender pretty merrily but wanted to see how a real-time AV would affect performance and boost security. RSS Pro seemed like a logical choice. I installed on a clean and freshly defragged system and used System Restore, Virtual System and the real-time AV component. I soon noticed that a whooole lump of fragmented files dumped on my hard drive. I've since uninstalled RSS and reinstalled Windows as no amount of defragging was clearing up the files. My question is this: Was this mass of files a direct result of the RSS virtualisation process? In which case it would appear to use more space than Shadow Defender or Deep Freeze combined many times over.