I tried the update my z1 with pc companion but it failed without no reason. Now when i trying start the phone it shows this message: "Software update failed, make sure the phone is connected to the computer and try again."
Try performing a system repair as this will often fix issues after an upgrade - This will factory reset your phone
Switch off your phone and unplug from Pc (Hold volume up and power for around 10 seconds) Start PC Companion and select Support zone then Update my phone/tablet then in Blue Repair my phone/tablet and follow the onscreen instructions - When prompted connect your phone still switched off holding volume down or back button - This should start the repair or reformat process
If you are using Windows 8/8.1 or a 64bit operating system then adjust the settings for PC Companion and run in compatibility mode and chose Windows 7 or XP
