Download ccleaner, install and run all the options, cleaning, and sorting troubles etc... Dowbload malwarebyte, install it and run a quick scan, remove all malwares it will find after the quick scan. Trun of your antivirus software and restart your computer, make sure that your internet speed is good enough as the iOS is over 600mb. Now try to upgade your phone and leave tge computer alone while it's downloading the iOS and upgrading the phone. Good luck.
Originally Posted by Royalflushiphone4
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