And in terms of full usability and personalization of the system, you cannot use all the settings, and also you cannot personalize your desktop-s background like start color, change the theme, taskbar, lock screen, etc. But every time you open your system, windows will display the message “ Windows Isn’t Activated” till you activate the windows. But as per the reports, one can use it for numerous years. Can Someone Use Unactivated Windows 10Īs we had discussed above it is still now not sue for how many days one can use the unactivated windows 10. But however, if one wants to use windows 10 by having access to all its settings and without getting any annoying message to activate windows from Microsoft, it is advisable for people to activate windows 10 as soon as possible. The windows 10 installation does not stop working after some days now it will have the problem of recurrent booting up. How Long Can You Use it, Unactivated Windows 10 ?īut we cannot ascertain the exact number of days till when one can use the unactivated windows 10.