Unofficial download location for msizap.exe

Hey all,

I received an email this morning asking about how to manually uninstall the .NET Framework (due to some issues that happened after installing Windows XP SP2 – this is another issue that I’ll tackle in a future blog after I do some more investigation to figure out why we’re seeing so many problems installing .NET Framework service packs after installing XPSP2, so stay tuned for that).  There are a couple of KB articles that describe manual removal techniques:

Unfortunately, those articles reference a tool called msizap.exe that ships as part of the Windows Installer SDK.  Due to numerous functional and design issues with the Platform SDK installer, it is way more pain than it should be to install, not to mention that you have to install hundreds of megs of stuff to your machine even if you want only one tool that is shipped with it like msizap.  The person who emailed me with this problem found a location to download just the msizap tool.  I can’t officially endorse it because it is on a 3rd party company’s site, and I can’t be sure which version they have on their server, etc.  But it appears to have worked fine in the cases that I tried, so if you are in need and have a slow network connection and can’t take the time to download all the Platform SDK stuff, you can find it here.

Hope this helps….


Comments (11)

  1. There’s an official download, too. Have a look at the Windows Installer Cleanup Utility:;en-us;290301

    It contains msizap.exe and a nice, small GUI frontend.

  2. A Girl says:


    And here are the manual removal instrx:

    Amazing how many people have had trouble with it.

  3. I also should add that one of my other posts (located at provides information about a removal tool that automates the steps in this KB article so that hopefully you can avoid needing to run all of those manual steps to remove the .NET Framework 1.0 and 1.1.

  4. says:

    The link you posted doesn’t seem to go to a location where I can download the msizap.exe tool. It goes here…….

    This is a link to a "residual gas analyzer".

  5. Hi Bill –

    When I originally posted this blog article, that residual gas analyzer site had a link to msizap.exe, but that has since been removed. I would suggest downloading the Windows Installer Cleanup Utility from;en-us;290301 because it ships with a copy of msizap.exe.

    Thanks for the good catch on the link….

  6. James Coffer says:

    I Need to Unstall Microsoft visual studio 2003 and 2005 also

    James Coffer Please help

  7. Hi James – There is an automated uninstall tool to remove VS 2005 at  There is not any such tool for VS 2003, but you can use the entry in Add/Remove Programs to remove it.  If you have troubles after trying this, you can use the steps listed at as a last resort.

  8. Shaz man says:

    need msizap

  9. Hi Shaz man – there are a lot of places you can download MSIZap from – the Platform SDK, the Windows Support Tools (, the Windows Installer cleanup tool (;en-us;290301), etc.  Please let me know if you are not able to find it at one of these locations.

  10. Ashith Raj says:

    a very essential tool while working with MSI installations on a Machine.

    it can remove entries from the MSI Database is awesome.