What are your system specs cdrsubron7? In other words, cpu, motherboard (if you have the model), RAM amount, I am assuming Windows 11 64-bit, what hard drive or SSD drive you have the game installed on, video card, etc., also where on that drive you have the game installed, such as "C:\Games \Silent Hunter 4..." and if you have tried adding mods already? If you have, which ones, and also if you have, did you use the 4Gig Patch or LAA on the SH4.exe? I'm almost certain we're missing something simple... btw, I was like 99.999% certain you hadn't fallen of the bicycle hard enough to hit your head, and had probably remembered all the noob stuff, but just in case another user comes by and doesn't know... lol