Fritzing will not open

The only further thing that I can suggest is to try putting the path to Fritzing (mine would be C:\fritzing\fritzing.0.9.3b.64.pc yours may be different) at the start of your path environment variable. Its possible that some other package on your system has a program of the same name as something in Fritzing that is in the path before the version in Fritzing (this is a long shot ). If that works it will likely break something else (as the other program will now get the wrong version) but at least we will know where the conflict is. Previous failures have at least given an error message, so I don't think this is the same as the other failures we have seen.