So, installing .net 3.5 on a window server is not really that hard and normally you just need to run the command Add-WindowsFeature NET-Framework-Core -Source d:\sources\sxs, but recently I had a few machines where this simply failed with error code 0x800f0922 or other vague error code. Looking up these errors provided me with more than enough results in DuckDuckGo, but unfortunately none of them provided a solutions. In a few cases I even ended up with reinstalling the OS. And that was also the only lead I had. Clean installed machines didn’t had this issue, but machines that already received updates had the issue. Hmm…
