Read well and follow well the steps.
TEXT :
1- Open Start and Select Execute or Press Windows Symbol + R.
2- Type CMD , now type net localgroup Users /add.
3- Now you can install you Ragnarok II , WAIT! you don't Finish.
4- If you don't have permission to enter into folders or execute the laucher read step 5.
5- If you install the game like folder C:/Local Disk/Program Files/Gravity/Ragnarok , right click on the folder and select Share , now you need to select To turn folder into private road.
6- Now you can have acces to folders and open the launcher to patch this! Good Luck!
IMAGES :
Step 1 , 2 and 3.
Step 4 , 5 and 6.
if you have a problem tell me here.
sorry my bad english i am spanish man.
Good Luck.