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Error 1721 I am having the same problem... I have windows vista, and trying to install my HP critical updates... when I do I get the Error 1721 and it will not install updates. I did try to do updates straight from HP website and it did not work...even tried re-installation of windows installer 4.5, but that did not work... I am lost on what to do.... any help is appreciated.

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What Is Error 1721? This is an error commonly witnessed when you try to uninstall a program using the "Add or Remove Programs" in Microsoft Windows XP. The message itself will read: "Error 1721. There is a problem with this Windows Installer package. A program required for this install to complete could not be run. Contact your support personal or package vendor."
Resolution #1: Reregistering the Windows Installer service It is known that if the Microsoft installation engine malfunctions or is internally corrupted, there is a possibly that you will not be able to remove programs that you used the Windows Installer, the service that administers the installation and configuration of programs, to install with. Thus, in the case of error 1721, it is necessary to unregister and then reregister the Windows Installer service to fix the corrupted parts of the engine. This can be accomplished through the Safe Mode by:

  1. Enter your computer in Safe Mode by:
    • Restarting the computer and pressing F8 after the BIOS information is shown
    • Select Safe Mode and Enter
    • Select your computer and Enter
  2. Log on as the local administrator
  3. Open up the command prompt by clicking Start, Run, and then typing cmd.exe and Ok
  4. At the command prompt, first unregister the service by typing msiexec /unregister and then hitting Enter
  5. Reregister the service by typing msiexec /regserver and then hitting Enter
  6. Type Exit to exit the command prompt safely
  7. Try to remove the program once again using Add or Remove Programs
I hope this helps you out. Thanks

Posted on Sep 04, 2008

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I have Dell inspiron 1525 window vista recovery reports 5 error are detected in hard drive and memory errors detected on my laptop 1. hard drive doesnt respond to system commands-critical error 2.boot...


your HDD may be corrupted, re-installing windows vista is one option. Your best bet is if you have/ can obtain a copy of windows vista run setup and try the repair wizard in the windows vista setup, the wizard automatically finds errors and missing files and replaces them therefore solving any errors in your HDD. you can also try to use the recovery wizard from your recovery disc. best of luck

May 17, 2011 | Dell Inspiron 1525 Notebook

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I am not able to install the sprintsmartview to my dell studio 17 computer i keep getting an error 1721.


Since this error seems to reference the "Windows Installer" which is separate from the Installshield engine, I would probably try updating that:
The error by Windows Installer Package happens in Windows Vista because the of custom actions set in the installer package fail with missing permissions, involving custom actions that scheduled for both immediate or deferred execution. Visual Studio custom actions run while impersonating the installing user but only run with standard user privilege, and not with elevated administrator privilege as required in Windows Vista, if the msidbCustomActionTypeNoImpersonate bit is not set. Even though Windows Vista prompts for privilege elevation, however, only custom actions that are running in the Local System account get elevated correctly, while custom actions that impersonate as the current user do not.
Thus, the error usually happens on older versions of setup installer which install or uninstall programs meant for earlier versions of Windows operating system, such as XP, 2000, Me and 9x. However, if you're the programmer or developer for the installer program, probably you can do much to change the bit or installer sequence to solve the issue. But, there are still resolutions to fix the error 1721 that happens in Windows Vista, and probably has more than one one solutions or workarounds that users can try to get the software program installed.
Run an elevated command prompt with Run as Administrator option to start the installation
This method will probably allow most failed .msi installer to install/uninstall probably. Simply open an elevated command prompt with Run as Administrator setting, and then execute the .msi executable.

If you need more help come back.Post / thumbs / testimonial are welcome!

Nov 22, 2010 | Sierra Wireless 598U USB Modem

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Am getting 1721 errors on my computer, can you tell me how i can fix it ?


Here you go. This is long winded but should fix you up.
Error 1721 is a common problem for many different Windows systems, shown when the installation you're trying to perform develops a problem and needs to be fixed. If you have this error, it's recommended that you're able to first fix any problems that could be inside your Windows system, and then cure the specific issues that the Windows Installer program has on your PC. This tutorial is going to show you exactly how to do that...
This error will typically show like this:

  • Error 1721. There is a problem with this Windows Installer package. A program required for this install to complete could not be run. Contact your support personal or package vendor.

The problem with this error is actually caused by a very simple issue - the Windows Installer program that is used to install the various files & software onto your PC is actually damaged or corrupted & preventing your system from installing the program you want. This can be caused by a number of problems, including everything from having corrupt registry settings to the Installer program on your system being damaged. To fix this, you first need to make sure that Windows Installer is okay, and then get rid of any further system errors on your computer.
The first step to resolving this error is to "register" and "unregister" the Windows Installer on your system. This is a program which installs all the programs that you want onto your PC, and is constant on every Windows installation. The problem that often causes error 1721 is the way in which Windows often cannot read the Windows Installer program, because it's not "registered". Registering a program basically tells Windows where to look for it on your system, and it's often the case that this stored reference is either damaged or deleted by accident. To ensure this is not a problem, you need to be able to type the following into your system:

  • Load up "CMD" (click "Start" > Run > type cmd)
  • Type msiexec u/unregister
  • Type msiexec /register
  • Try reinstaling the program you wanted to

If you try this and find it does not work, then it's recommended you then use a program by Microsoft called the "Windows Installer Cleanup Utility". This is a new program which basically cleans up all the settings and options associated with the Windows Installer program; meaning that if you have any problems with the Windows Installer on your PC, they should be fixed. You may also wish to install Windows Installer 4.5, which will basically upgrade the Windows Installer program on your system, which should resolve many cases of the 1721 error.
It's also highly recommended that you use a "registry cleaner" to fix any of the errors that are on your Windows system. A registry cleaner is a type of software tool that basically scans through the registry database of your PC and fixes any of the problems that are inside it. The registry database contains all the settings, files and options for Windows, and is where everything from your most recent emails to your desktop wallpaper are kept. It's basically like a library for your system which is continually being used to help your software run correctly. Unfortunately, the registry is continually being damaged & corrupted, leading it to become highly ineffective and erroneous. To ensure this problem is not causing the 1721 error, you should clean through your system with a registry cleaner tool.

Sep 11, 2010 | Dell Computers & Internet

1 Answer

I have an Aspire 5050, I have bought a Kodak All in one printer. When I try to install it it gives me error code 1721. I was on the phone for 4 1/2 hours with Kodak and they advised that it is something...


Error 1721. There is a problem with this Windows Installer package. A program required for this install to complete could not be run. Contact your support or package vendor.

Sep 03, 2010 | Acer Aspire 5050-3242 Notebook

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Code 646 when trying to update


You need to disable your firewall. If you’re using McAfee Personal Firewall, or Norton Internet Security or another Firewall vendor, see vendor support page for assistance in disabling it (temporarily).

If you’re using the built-in Vista Firewall, keep reading.

- Open the Control Panel and select Security.

-Select Turn Windows Firewall on or off.

- Select Off (not recommended), click Apply and then OK.

- Back at the Windows Update screen, click the Try again button.

-The download(s) and installation should start…

-And this time successfully install. Now make sure to re-enable your Firewall once your PC restarts.

* Though this solution will work for most Vista Update errors.





Oct 24, 2009 | HP Pavilion dv1000 Notebook

1 Answer

What is error 1721..........How do I reinstall HP Updates?


This is an error commonly witnessed when you try to uninstall a program using the "Add or Remove Programs" in Microsoft Windows XP. The message itself will read: "Error 1721. There is a problem with this Windows Installer package. A program required for this install to complete could not be run. Contact your support personal or package vendor."

I Googled your error and this is what I got. As far as your update question, I think you can just go to HP website, and redownload and reinstall all the updates that you are in need of. If you are speaking of Windows Updates, you can redownload those to. Just go to Microsoft website and in their search box, type in reinstall updates; of course, you will also have to type in there which updates you need to reinstall. Hope this helps.

Sep 04, 2008 | Computers & Internet

1 Answer

Error 1721


Okay, lets begin. First off you were trying to install .msi packages? Second how new is the computer? Third how much stuff do you have on the computer? Finally forth Have you had any spyware/ viruses? I need this information to continue troubleshooting.

RCF

Aug 31, 2008 | Microsoft Windows XP Professional With...

1 Answer

Error 1721


Try the following regardless of the software as this is the common error message provided by Microsoft. Of course this won't rule out either a corrupt installer or incompatibility's
  1. Disable/Configure any anti-spyware or anti-virus software on your system during installation process. For example: Spybot Search and Destroy Program or Norton Anti-Virus
  2. Check to see if any spyware or adware is installed on your system blocking the completion of install process.
  3. Check to see if you find any unwanted entry in Add/Remove Programs or Internet Explorer - Add/On's section (Tools - Internet Options - Programs -> Manage Add On's). If you found one, remove/disable this entry.
  4. On Windows Vista, disable UAC (User Access Control) feature for your account

Aug 27, 2008 | Microsoft Windows Vista Ultimate Edition

1 Answer

Error 1721


This page applys to XP,

http://support.microsoft.com/kb/891985

but the solution should be similar. If you've done the registering, the next suspect would be something corrupt in your VPN package.

Try a fresh download or copy of it, and be sure you run as administrator during the install.

Jun 28, 2008 | Microsoft Windows Vista Ultimate Edition

1 Answer

Error 1721 vista


I'm not sure if Vodafone is compatible with Vista. I thought it was only compatible with OS's up to XP. I'm not 100% sure though, maybe you just need a driver of some sort.

Mar 29, 2008 | Microsoft Windows Vista Ultimate Edition

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