Final answer:
Deleted registry files in Windows can often be restored from the System Restore folder using the System Protection feature. This action reverts the system to a previous state where the registry files were intact but may also affect installed programs and system settings.
Step-by-step explanation:
Registry files in Windows operating systems are critical for the system to function properly. If they are inadvertently deleted, Windows has a built-in feature that can restore these registry files from a backup. The backup registry files are typically saved in the System Restore folder. This folder is part of the Windows operating system's System Protection feature, which creates restore points that include a copy of the registry files. To restore a deleted registry file, you would need to perform a System Restore operation to return your computer to a previous state when the registry was intact. Keep in mind, however, that performing a System Restore will also affect installed programs and system settings; therefore, it should be used cautiously.