Thanks for noting this issue!
Another way to uninstall the WiDi Widget is to download the install package from here:
WiDi Widget Download
Right click on the file and select "Uninstall."
You will be prompted to Accept that the installer is making a change. Accept this.
WiDi Widget will be removed. To get it back, just double click the installer and follow the prompts.
Shashi
Intel WiDi - Applications Engineer