Fixing Project Navigator, iMPACT and License Manager
1. Open the following directory: C:\Xilinx\14.7\ISE_DS\ISE\lib\nt64 
2. Find and rename libPortability.dll to libPortability.dll.orig
3. Make a copy of libPortabilityNOSH.dll (copy and paste it to the same directory) and rename it libPortability.dll
4. Copy libPortabilityNOSH.dll again, but this time navigate to C:\Xilinx\14.7\ISE_DS\common\lib\nt64 and paste it there 
5. in C:\Xilinx\14.7\ISE_DS\common\lib\nt64 Find and rename libPortability.dll to libPortability.dll.orig
6. Rename libPortabilityNOSH.dll to libPortability.dll
OK, I have fixed this, you can try in your windows.

https://www.youtube.com/watch?v=jBJlW40kAAU 
https://www.youtube.com/watch?v=ttPbEcNjdo8