If you tried removing a program using Add or Remove Programs tool but the removal fails, the installation of the application is maybe corrupted. This is true only if the installer has bug or you have a program that interferes with the installation of software.
To sort this problem, you need to temporarily disable the real-time monitoring of antivirus, firewall or other programs that can interfere with the install process. Please note that you will only do this if you are quite sure that the installer is safe to install. Your antivirus program should detect something on the executable file during the download process or when you insert the installation disk.
Next, ensure that you have the latest installer of the program that you are trying to remove then start installing it again so the corrupted installation is fixed. When the installation wizard prompts in rebooting the computer, please do so.
Finally, start removing the program again using Add or Remove Programs tool.