Win7 open recycle bin "The property of this project is unknown" solution

        1. First, we simultaneously press the win+R shortcut on the win7 Ultimate computer keyboard to open the computer's running window. In the open running window, we enter gpedit.msc and click Enter, so that we can open the win7 flagship. The Group Policy Editor window for the version of the computer.
2. In the Group Policy Editor window that opens, we click to expand “User Configuration”→“Administrative Template”→“Desktop'; In the right window, find the "Remove the properties of the Recycle Bin context menu" option and double-click to open it.
3. In the pop-up edit window, we will change the default setting to unconfigured, then click OK to save.