Microsoft Visio Standard 2007 install/uninstall problem

I needed to free up space on my C: drive, so I attempted to uninstall Microsoft Vision Standard 2007 -- but the uninstallation would not work using Add/Remove Programs. So, I hastily used the Windows Installer Clean Up Utility to remove it, which is appears to have done to some extent.

Problem: The program is still appearing in the Add/Remove programs pane, and it won't allow me to uninstall from there.

I've tried reinstalling Visio from the disc, but receive this error right before it quits:
"Microsoft Office Visio Standard 2007 encountered a problem during setup."

I don't want the program anymore, I'm just trying to remove all traces of it from my computer without causing further damage.

When I run Microsoft Office Diagnostics, I got this result:Setup Diagnostic — Missing media

The Setup Diagnostic was not completed because a valid source was not found. Either the local installation source is missing, or the original source that was used to install Microsoft Office is not available to the repair process. You may need to provide the original source to allow this diagnostic to run successfully. Valid sources for the 2007 Office release include the following:

• Your 2007 Office release installation CD
• An installation disk or repair CD provided by the vendor of your computer
• A connection to a network installation of the 2007 Office release

After you obtain access to a valid source, run Office Diagnostics again.


Any help would be great,
Thanks!