How can I uninstall a program not shown in Add/Remove?

I inadvertently installed the Windows 7 X64 version of Macrium Reflect (paid version) on a computer running Windows XP Professional X32.   The program does not appear to function correctly, but I cannot remove it since it does not show up in Add/Remove Programs in Control Panel and does not appear in the list of Programs above the Start button.   I tried the Windows Installer Cleanup but it does not show the program.   How can I remove it?   I do not want to make the computer unbootable.
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Or use RevoUninstaller:
Tony GiangrecoCommented:
Check with the company's support group. They may have a Clean Wipe utility to remove their applications from the box. If that isn't available, you can go into the registry and remove it along with the program foles folder or reinstall windows.

Removing it from the registry can be long and dangerous. Only proceed after taking a backup and knowing what you are doing.
Use ccleaner OR first install it properly and then uninstall the same.
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You can also try serching the registry keys in HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall to see if the software at least exists in there, and then remove it woth msiexec.

If the key name is something like {23170F69-40C1-2702-0465-000001000000}, you shoiuld be able to remove it by running:

msiexec /x {23170F69-40C1-2702-0465-000001000000} from a command prompt.
if everything else fails: 
Mohamed ElManakhlyInfrastructure Team LeaderCommented:
DoctorK12008Author Commented:
Worked perfectly.   Simple, clear answer.   Thank you so much!
You're welcome.

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