How to backup your Windows Registry and Restore your Registry from the Backup. Registry Backup, Restore, Import And Export. The steps are rather simple. How to backup: Press the Windows + R keys to open the Run dialog box. Type in 'regedit', and then press Enter. On the File menu, click Export. Name the file 'regbackup-010120.reg' or something you'' remember. Select a location where you want to save the Registration Entries (.reg) file. Click Save. Windows 10 Tutorials:    • Windows | Tutorials, Guides, and More!