I have an old lumia 535 phone and could not upgrade the windows earlier. Now I want to upgrade the windows and unfortunately, Microsoft store for windows 8.1 is not functional and cannot install update advisor application. I would link to know that is there any alternative way to upgrade the windows on lumia 535 for example using windows computer?
There were following two ways to upgrade windows 10 on phones with windows 8.1:
Windows 10 Upgrade Advisor app
Over-the-cable Updater tool for Windows Phone 8.1 and Windows Mobile 10
However, after shutting-down of Windows 8.1 app store and unavailability of Upgrade Advisor app on phone, option 1 is no longer a solution. To upgrade the windows on phone using option, download the software from following link and follow the instruction: