It seems to be unable to load "xactengine2_0.dll", could be because its been damaged, corrupt or missing.
Or directx itself could have become bugged.
To try and fix this error you could try going into your command prompt (cmd) and using the command "sfc /scannow" and hope it will find and replace the missing/damaged file.
You could also try and force it to register the dll by going back into the command prompt and typing "regsvr32 /u xactengine2_0.dll" and then typing in "regsvr32 /i xactengine2_0.dll"
Also Johannes in regards to the RealTek driver im merely guessing that his computer has a RealTek sound card because i have surprisingly not really found any motherboards with an integrated sound card that isn't from RealTek.
Maybe exept this one: https://www.newegg.com/Product/Product.aspx?Item=N82E16813128706