Скачать или смотреть How to Clear the Run Command's History in Windows.

Windows's "Run Command" box is extremely useful, because it lets you launch programs from the desktop as you would from a command line.

The Run Command keeps a history of your actions and shows you your most recent command every time you open it. It also autosuggests commands you've used before as you type.

However, you might find these suggestions annoying. You might also worry that, if someone else uses your computer (without you logging out), they can see this command history. Fortunately, it's very easy to view the Run Command's history and delete all or some entries.
This history of Run commands is saved in registry key which is specific to each user of the computer. anyone can clear this command history by deleting all values under this registry key.