How to Fix Error 1721

 

When people are using computer, they often need to remove some unnecessary software. Some people will use software to uninstall it, some people will remove the software manually. But when they use the “Add or Remove Programs” feature in the Windows Operating System, they will always receive error 1721. What does it mean? What causes this error? Many people have such kind of question in their mind. In this article, we will give you a detail introduction. What’s more, we will offer you several method to fix it.

 

Causes of Error 1721:

 

On the one hand, this error indicates that there is a problem with this Windows Installer package. And a program required for the install to complete could not be run properly. On the other hand, misconfigured system files or corrupted registry entried can also cause error 1721.

 

How to Fix Error 1721？

 

If you want to fix it effectively and efficiently, you can use automatically software.

Smartpcfixer can be the best choice for you. SmartPCFixer™ is a top-ranking error-resolution registry cleaner which will fix the computer errors and optimize the system settings. You can scan, clean, optimize, and keep your PC much healthier with it!

How to Fix it with Smartpcfixer?

 

STEP 1 Download Smartpcfixer & Install it. (Note: If the download link doesn’t work you may need to download it from a Download Mirror).

STEP 2 Scan Your PC for Errors.

STEP 3 Click the “Fix All” Button to Repair Your PC.

Of course, if you are a technical guy of computer, you can do the following step to troubleshoot this error.

 

Re-register Windows Installer Service

 

 1.Restart your computer and log in Safe Mode. You just need to Press F8 when you see the BIOS information on you screen.

2. Log on as “local administrator.” Click “Start” and select “Run.” Type “cmd.exe” in the “Run” box and click “OK.” This will open the DOS (command) prompt.

3. Un-register Windows Installer service by typing “msiexec/unregister” at the command prompt and hit “Enter.” Immediately re-register Windows Installer by typing “msiexec/regserver” on the next command line and hit “Enter.” Type “Exit” to close out of the command prompt. You can now attempt to remove the program once again from “Add or Remove Programs.”