Click on Start > All Programs > Accessories > Command Prompt, type regsvr32 vbscript.dll and press Enter. After you get the DllRegisterServer in vbscript.dll succeeded message, close the Command Prompt and try uninstalling the program normally.
Also you can try using Revo Uninstaller. Even if it can't uninstall the application normally, it will force it to uninstall by wiping out all traces of its presence from the system.
After that, try running AdwCleaner to make sure that there are no leftover rogue registry keys or toolbars in your system.