There is a clean up utility on the 6.3.2 installation CD in the Utilities folders called "QNXWinCleanup.exe". Run that 
and you should be able to reinstall.

Hi Ken,

Sometimes installation of the SDK on Windows can get messed up. While you
can go back and figure out what went wrong, it's generally more expedient to
do a fresh installation. Once you've uninstalled the necessary service packs
and the base OS, run through the following items.

  1. Are the Environment variables set? If you're starting from a fresh
install, 
       then the environment variables shouldn't be set. You can check/change
these 
       by doing the following:
       1a) Right click on My Computer and select Properties
       1b) Select the Advanced Tab
       1c) Press the Environment Variables button. If QNX_HOST and
QNX_TARGET are set, clear them.
  2. If you're installing fresh, then ensure that QNX630/install is cleared
out.
  3. To completely remove QNX from a Windows installation, ensure that the
following do not exist.
       <drive>:\QNX630\host
       <drive>:\QNX630\target
       <drive>:\Program Files\QNX Software Systems
       <drive>:\Windows\vpd.properties

NB: You can leave <drive>:\QNX630\workspace. It won't be affected across
installations.

If the above suggestions do not fix the problem then please send the
following information to me:

  1. the xml file(s) in c:\QNX Program Files\QNX Software Systems
  2. the output of 'qconfig', run from bash
  3. the output of 'set' in a bash shell.
  4. the 'zipped' installLog.txt (text file is found under the qnx base dir
eg. c:\QNX630) 

If after doing all this, you are still encountering installation issues,
please verify the cksum of the installation media. If you've received a CD
from QNX, download the latest release from MyQNX and create your own image
based on the ISO. If that's not feasible, please contact your QNX sales
representative and ask for new installation media.  

Cheers,
-Brian

> -----Original Message-----
> From: Ken Schumm [mailto:kwschumm@qsolv.com] 
> Sent: Thursday, April 03, 2008 13 39
> To: general-toolchain
> Subject: QNX 6.3.2 won't reinstall on Windows
> 
> Due to a severe case of "versionitis", caused by switching 
> back and forth
> between the 6.3.2 release and the Trinity release, my 
> Momentics environment on Windows became so corrupted no BSP 
> would successfully build.
> 
> So I uninstalled everything and am trying to reinstall from 
> the Momentics
> 6.3.2 ISO.
> 
> Every time the installation starts it gives the message
> 
> "The installation cannot continue because this product is 
> already installed. If you wish to reinstall it, please 
> uninstall it first."
> 
> It *IS* uninstalled.
> 
> What needs to be fixed so I can reinstall QNX 6.3.2?
> 
> I've gone through the registry and, as far as I can tell, all 
> the easily identifiable QNX entries have been deleted.
> 
> _______________________________________________
> General
> http://community.qnx.com/sf/go/post6436
>