Apr 5, 2008
Tip and Trick Editorial

NSIS Error and Cannot or Unable to Open and Install Setup Installer

After downloading some software programs’ setup installer from Internet, such as BitTorrent, BitLord, iTunes, McAfee Site Advisor, Ethereal, Winamp and many other applications or drivers, users may face a problem where the setup executable cannot be installed. Whenever attempt to install, the installation will fail with the following error message.

NSIS Error

The installer you are trying to use is corrupted or incomplete.
This could be the result of a damaged disk, a failed download or a virus.

You may want to contact the author of this installer to obtain a new copy.

It may be possible to skip this check using the /NCRC command line switch


NSIS Error

Installer integrity check has failed. Common causes include
incomplete download and damaged media. Contact the
installer’s author to obtain a new copy.

More information at:

The NSIS (Nullsoft Scriptable Install System) error message box basically means that the setup executable or installer user is trying to run is corrupted, or incomplete. However, often it’s not the actual cause.

If you’re unsure of whether you have downloaded a complete and correct version of installer file, try the few solutions posted on NSIS open source page to ensure that the setup installer is valid and not corrupted.

If you are confident and verify that the installer is indeed valid and in good condition, but still encounter the NSIS Error dialog box and stop halt and fail the installation, then another possible reason for NSIS error to appear is problematic network connectivity, either due to faulty network card, or Internet or LAN connection to upload, download and transfer files been blocked or restricted.

Network adapter failure is unlikely to be a common cause, unless you have problem surfing or downloading the file too. So, the resolution to NSIS Error can come down to simply checking if there is any firewall or other security software running on the computer that causing the NSIS Error.

One possible candidate is Windows Firewall which exists in Windows XP and later operating system such as Windows 2003, 2008 and Windows Vista. The solution is to disable the Windows Firewall and run the installer again.

Other reported problem maker that trigger NSIS Error include integrated nVidia NIC (network interface card) that includes a firewall. In this case, user have to change the network adapter to one without firewall or switch to wireless network temporarily to get the installer installed, as disabling the network card will still cause NSIS Error.

  • sousan

    helllo i cant setup paltalk messenger i need help plz

  • muhsin

    ennikk anchali old lipi instal cheyyann saadikkunnilla.plees help me

  • Keven Trotter

    @Tahir Afridi thx, it works 😀

  • Tahir Afridi

    If you found this type of error then archieve the file with winrar in either its zip or rar file then from zip file run the software i hope it will help u and u enjoying thnx with me its work i downloaded vlc player and then it given me a NSIS Error and then i do this trick i successfull

  • lime wire activate

  • Simon

    I found if you copy the files to be installed to another drive, such as a USB drive and then install from there it works fine.

  • street girl

    why i cant remove the KMplayer from my notebook?

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  • rhadoo

    if you want to install something and you get NSIS error try running in safe mode, install the program and reboot after that in normal mode. That's the only way i could figure it out.

  • Sanya

    Thnx for it! /NCRC !!!

  • Blubster will start to download then stops with the NSIS Error what should i do

  • jeffrayner

    i pulled many a hair out of my head trying to get flash to work with google chrome, but alas kept getting the nsis error

    after trying everything suggested, nothing worked

    then i tried mixing them together and the solution is beautifully simple…

    step 1) remove chrome using the google chrome uninstaller in the start menu

    step 2) in file explorer go to C:Documents and SettingsYOURUSERNAMELocal SettingsApplication DataGoogle

    step 3) delete the CHROME directory and its subs.

    step 4) resintall google chrome

    step 5) go to a site that needs flash (such as the google chrome home page http://www.google.com/chrome and reinstall the plugin

    the reason…

    It turns out that uninstalling chrome doesnt delete this afore mentioned folder and its contents (containing plugins). consequently, if you reinstall chrome you are left with the same problem.


  • piolet 3.01 will not install please help me.

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