How do I uninstall Office 2003, Office 2007 or Office 2010 suites if I cannot uninstall it from Control Panel?
Steps to resolve this problem
Verify that you cannot uninstall the Microsoft Office system by using the Add or Remove Programs feature or Programs and Features feature. To do this, follow these steps:
For Windows XP or Windows Server 2003
1. Click Start, click Run, type control appwiz.cpl in the Open box, and then press ENTER.
2. Click to select the Office system product from the application list, and then click Remove.
For Windows Vista
1. Click Start, type programs and features in the Search box, and then press ENTER.
2. Click to select the product to be uninstalled from the listing of installed products, and then click Uninstall/Change from the bar that displays the available tasks.
For Windows 7
1. Click Start, type programs and features in the Search programs and files box, and then press ENTER.
2. Click to select the product to be uninstalled from the listing of installed products, and then click Uninstall/Change from the bar that displays the available tasks.
If you can uninstall the Microsoft Office suite by using Add or Remove Programs, you are finished with this article. If you cannot uninstall the Microsoft Office suite, you may have issues with the Add or Remove Programs dialog box, or some Microsoft Office components can not be uninstalled. In these cases, you cannot reinstall the Microsoft Office suite. Go to the next section to uninstall the appropriate Microsoft Office suite by using an alternative method.
http://support.microsoft.com/kb/290301