The registry fix worked tho ...
Dont understand why but w/e ._.
Edit: So I just looked up the standard value on my notebook where I don't have this problem with directx. It was already
04.18.2011
With the registry fix I changed the value on my PC to this one (04.18.2011) and it fixed the problem.
I didn't look up the value before I changed it (I'm stupid..), but I guess it was a different one ...
Just type in windows search "regedit", open it and go to this path
[HKEY_LOCAL_MACHINE\SOFTWARE\WOW6432Node\GamersFirst\APB]
"directX ShipDate"="04.18.2011"
Then you can look up your value.