Insider preview Windows 10 versions have a built-in "time bomb". Each comes with an expiration date and Windows will eventually refuse to start fully after that date. Here's how to check when this will happen.
What happens when a version of Windows 10 expires?
This only applies to unstable versions of the preview version of Windows 10 Insider Preview. Stable versions of Windows 10 never expire and no longer work, even when Microsoft stops updating them with security patches.
When a version of Windows 10 expires, Microsoft said you will see a warning that you are using an expired version. The warning will reappear once a day and you will also see UAC (User Access Control) warnings. Earlier reports indicated that Windows 10 will restart every three hours after it expires. Microsoft may have made the expiration process less boring.
In the past, Microsoft has m said Expired builds will not start two weeks after the expiration date. You will need to reinstall a new version of Windows, or an old stable version that will not expire, to use your computer again.
Microsoft is removing these versions to prevent users from keeping old, unstable versions of Windows 10. These versions of Windows 10 are now available for testing and there is no need to test an older version with many bugs already fixed.
How to check the expiry date
You can check the expiration date from the winver application. To open it, press the Windows key, type "winver" in the Start menu and press Enter. You can also press Windows + R to open the Run dialog box, type "winver" into it, and press Enter.
This dialog box shows you the exact date and time for your version of Windows 10. You need to upgrade to a newer version of Windows 10 Insider (or go back to a previous stable version) before expiry date.
The winver dialog box also shows you the exact version of Windows 10 that you are using. This information can also be found in the app Settings.