Return of Reckoning

I know there are alot of threads, but I´ve got the very same issue the last three days in a row:

Could not connect to Login server
System.IO.FileNotFoundException: Could not find file 'C:\WINDOWS\system32\data.myp'.
File name: 'C:\WINDOWS\system32\data.myp'
at System.IO.__Error.WinIOError(Int32 ...

Hii,

first i'll shortly introduce myself :c : I'm Alexa, 22years old and from germany- I'm about to change what I'm studying this summer and till then i've a lot of free time :3
Also I'm experienced in MMO's, mainly wow, but sadly I never could test out the warhammer one, because it disappeared so ...