Try performing system restore to get back to the previous version of your Windows to get rid of Windows 10 installer error 1721.
In case you need to clean up files then click on clean up system files and click on OKĪfter performing a disk cleanup, try to install a program and see whether the error 1721 Windows installer is fixed or not.
Click the file that you want to delete under Files to Delete and click on OK.
Select the drive that requires cleanup and click on OK.
Type disk cleanup and click on the search result.
Solution 2: Try Disk Cleanupĭisk cleanup is a utility tool for computer maintenance that will help to flush out the files in the drive that is causing the installer error 1721.įollow the steps to perform disk cleanup:
Restart your computer, try to install a program and check if the error 1721 windows 10 still appears or not.
You will receive a message For changes to take effect, you might need to restart Internet Explorer, click OK and close the Internet explorer.
Now, click on each add-on shown in the list.
In the Manage add-ons Windows, click on Add-ons that have been used by Internet Explorer.
Solution 1: Disable Internet Explorer add-onsĭisabling the internet explorer add-ons might help you in solving the installer error 1721.