Hi, sorry I didn't find any way of fixing this i just waited for the next version of PDI(1511), it worked for couple of weeks then I had the same error again. Now I'm using a virtual machine and every time I've got this erorr I just reinstall windows again on my virtual machine. Unfortunatelly this is not a solution it is just a workaround.
Please let me know if you find any solution.
Thanks,