Windows 7 Show Desktop Button Remover is a free portable tool that removes the show desktop button (at the right-corner of the taskbar) in Windows 7.
Apps from door2windows are truly free and DON'T include any offers to install 3rd-party apps/adware/toolbars/unwanted software and never will. The apps are portable and don't require installation.
Download door2windows App Bundledoor2windows App Bundle gives you access to all the latest apps released by door2windows in one download (along with future updates).
How to use:
Just run the tool as administrator and click Remove Show Desktop Button. Now the show desktop button will be removed:
If the button shows up again after reboot, make sure that your anti-malware app isn't interfering with the app.