Windows Run command or popularly used as Win Key + R comes very handy to run applications or Windows features easily without having to open the application from the start menu. Similar to browsers, the run command also has a history, which means if you run a command using the run, it is saved and next time you can see from the list. WindowsRunHistoryEditor is a simple freeware tool which allows you to view the run command history and also edit them.
With this little tool, you can edit the MRU list (Most recently used) of the windows run-dialog. You can also erase all saved data (history) with one click. The application is completely portable and does not require any installation.
The application shows a maximum of 26 entries which are saved by Windows. To edit or delete, click on the box corresponding to the entry and once edited, click the save button.
Download WindowsRunHistoryEditor
Here’s a simple way of doing this without downloading any tool..
Delete windows run history
Windows run history can be deleted simply by modifying registry key as mentioned over here : http://www.windows-commandline.com/how-to-clear-windows-run-history/