I have a Steam SH3 and SH5 install on my Windows 10 computer. Since I did not have a Steam or disk SH4 for this computer, I purchased a UPlay SH4 and installed that. Its installer "saw" my Steam SH3 & SH5, and put them on the UPlay menu. However, you can still start them through the Steam front-end, which is what I would do. I also installed TWoS mod, and it does fine on my system. The main thing is to NOT have the Silent Hunter games in a "Program Files" folder on your system. I altered my Steam install path to "C:\Games \Steam..." which still put parts of Steam itself in the "Program Files (x86)" folder, but the games ended up in the "C:\Games \Steam \SteamApps \Common\..." folder...
