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Error 1721 Troubleshooting Windows Vista Installer

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Here are some simple methods that you can use to fix Windows Installer error 1721 Vista.

Error code 1721 is associated with Windows Installer. You get this when you try to install or uninstall a program. This happens when Windows Installer is damaged, corrupted, or when an issue prevents the desired program from being installed.

 

 

by A · Released Update

error 1721 vista windows installer

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Reason

Either UAC is hindered by its slaveeither the IIS 6 management compatibility option is not installed.

Method 1: Fix The Error With An Advanced System Recovery Tool

The most common reason for a program to fail is damaged or corrupted system files such as DLL files, EXE files, Sys files, etc. There are thousands of small system files that perform specific tasks. If any of the files are replaced, deleted, or damaged, you may see Windows Installer error 1721.

Download and install Advanced System Repair Tool and scan your computer. It has a large database of 25 million files. It will find all damaged or deleted system files and reinstall them with a new one. After optimizing with Advanced System Restore, try installing the software again.

Method 2: Re-register The Windows Installer File.

As explained above, Msiexec.exe is the Windows Installer file that is responsible for adding and removing software from the PC. If this file becomes unavailableWell, the system cannot install and uninstall software. To fix this problem, you must re-register this file.

Step 1. Open the Run dialog box by pressing Windows R at the same time.
Step 2: Enter MSIEXEC / UNREGISTER in the Run dialog box and click OK. This command displays only the registry of the Msiexec.exe file.

Step 3. Open the Run dialog box again and run the following command to re-register the Msiexec.exe file.

MSIEXEC / REGSERVER

Now restart your computer and check if error 1721 appears again or not. Before restarting your PC, you must add this article to your favorites. If this method doesn’t work, here’s a detailed guide on how to fix this error.

Method 3:

Disable your antivirus software and firewall, then try installing the software. Use this method only if you are completely confident in the application.

Method 4:

Run the sfc / scannow command to restore the system file. If there are any problems with W filesindows, this command will fix them automatically. Open Command Prompt as Administrator, paste the following command and press Enter.

sfc / scannow

This command searches the entire system files and replaces the damaged / corrupted system files with the correct Microsoft files.