1. Click on the start menu and Click Run-> regedit.
2. This opens the registry editor. Navigate to HKEY_CURRENT_USER\Control Panel\Desktop. Here you can see an entry by name FeedbackToolEnabled.
3. Double click on the DWORD value and make it to 0 from the current value.
4. Close the editor and log off Windows to take the effect.
Next time you log into Windows 7, you will not see the Send Feedback link.