ctcp doesnt work sometimes. It seems bugged. Its not all about bugs, there isnt new version for quite some time. The registry is changing slightly with every new Windows Update. There are also other tweaks that can be added as options like ethernet interface metric, WINS, DNS options too. or get improved RWIN option back. Receive & Transmit Buffers, ecncapability, Some power saving options too. Thats on top of my head but im sure im forgetting something here. I see in forums useful tweaks for older Windows versions & Im wondering are they working on Windows 10