Internet Explorer 9 just released by Microsoft yesterday, some of the
users may face issue showing error message below and the installation
of internet Explorer 9 did not finish during setup.

    Internet Explorer Did Not Finish Installing
    Setup can=92 continue because a more recent version of Internet
Explorer is installed on your computer.

This issue caused by beta, preview build or RC build of Internet
Explorer 9 installed on system to prevent final version installation.

A very first step to troubleshoot this error message is to check
whether you have previously installed beta, preview build or RC build
of Internet Explorer 9. Go to Control Panel > Uninstall a Program >
third party software listing and in Installed Updates to see if an
earlier build of Internet Explorer 9 is listed there.

Follow below instruction to uninstall Internet Explorer 9:

1. Start button, type Programs and Features in the search box, and
then click =93View installed updates=94 in the left pane.

2. Under =93Uninstall an update=94, scroll down to the Microsoft Windows
section.

3. Right-click Windows Internet Explorer 9, click Uninstall, and then
when prompted click Yes.

4. Click one of the following:

* Restart now (to finish the process of uninstalling Internet Explorer
9, and restore the previous version of Internet Explorer).

* Restart later (to wait until you shut down or restart your
computer).

If you are using Windows 7 Professional 64-bit system, you may still
face problem with similar error message when you run the Internet
Explorer 9 setup after perform uninstallation steps above.

Refer to Microsoft Knowledge Base entry 2409098, suggested to run the
Internet Explorer 9 setup with administrative privileges by right-
click on IE9-Windows7-x64-enu.exe and select on Run as Administrator
to resolve this error.

Regards,
alex
http://www.pupuweb.com/blog/resolve-internet-explorer-9-did-not-finish-inst=
alling-error/

Thanks for this post, i will try that.

I did all these steps but does not work for me, however finally i got the solution for that and i got rid of this problem.and now i would like share this to all.
please open this below solution i hope that would be work for you. because it has worked for me.
Solved
http://www.techsupportall.com/how-do-i-fix-internet-explorer-did-not-finish-installing/

Many thanks to www.Techsupportall.com