I am not sure if it exists for Windows 8.1 x64 Pro Update 1, but I remember TCP/IP patcher existed for Windows 7 SP1 x64. Is there one for Windows 8.1 Pro Update 1? Where can I get it? Are there any specific instructions needed to make it work? Some say its worthless, but I always had improved network performance after maximizing the number of half-opened connections. Also, is there a universal watermark removal tool? I often use Windows 8.1 Test Mode or some other mode that has a watermark - how can I get rid of it? I think I found some tools, but all links to the needed downloads were broken!