Something is changing my default PDF viewer to Libra open office where I have it always on fireFox pdf viewer. If I set it one time. The wps gets to open up in Task mgr and always is there to take over PDF's. WHY and how can some security setting let this happen. ? Going to program defaults-- does not even show FoxIT Reader but shows the WPS Libre office. and its defaults are greyed out that can't be changed so it doing this on its own also. WPS libre office defaults are greyed out and can't be changed. So their setting override ??? OMG>