Well the SX50 uses EPROM type memory. I don't think you can avoid a reset. However make sure that you do a program dump before you reset just in case you can't get the thing back up. I don't have time to tell you how to do that now since I am late for an appointment but others here can give you the procedure. Just make sure you have plenty of paper in your printer (hopefully you have one on site, if not you can dump it to a computer with hyperlink or other terminal program). I think eventually you are going to have to cross your fingers and reset, but don't do it until monday. There was an old Movie titled "Never on Sunday" in the phone business I have learned "Never on Friday". Good luck.