purely coincidental, in another thread in here about the same problem, brink told that he/she had completely uninstalled everything nvidia and it worked for him/her...i was about to do the same. but before I was just going to make sure that I had the drivers and files to reinstall everything again...on nvidias homepage there was a scanner to check what hardware you were having...but it wouldnt work because my java was outdated. well I updated and on a whim i just checked cura, and it worked.
Now, I cant say for sure that its java thats the culprit...but it was all I did install .... nothing I did before helped, including updating everything nvidia and windows