It's the monitor-shaped icon at the top of the Registry sidebar, which is on the left side of the window. Doing so will select it.  You may have to scroll up to the top of the sidebar to see this icon. This step will allow you to back up the entire Registry, but you can do this with a specific folder or set of folders in the Registry as well. This tab is in the top-left side of the Registry window. A drop-down menu will appear. It's near the top of the drop-down menu. Doing so opens the Export Registry File window. Type in the name for the backup. It's wise to use the current date or something similarly identifying in case you need to restore the backup. Click a folder on the left side of the Export Registry File window to set it as the place where your backup will be saved, or click a folder in the middle of the window to specify a folder inside of your current location. This button is at the bottom of the window. Doing so will export a copy of the Registry's current settings, values, and other data. If something goes wrong with the Registry while you're in it, you can restore this backup to fix minor to moderate errors.  To restore a Registry backup, you'll click the File tab, click Import… in the drop-down menu, and then select your Registry backup file. You should always make a new backup of the entire Registry before editing it.
انقر على خيار جهاز الكمبيوتر Computer. افتح القائمة ملف File. انقر على خيار التصدير Export…. اختر اسمًا لملف النسخة الاحتياطية. حدد مكان حفظ الملف. انقر على زر الحفظ Save.