I am running Windows 10. All updates installed. When I export ALL keys of the registry, it fails when it gets to the Computer\HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run key It says "Cannot export filename: Error writing the file. There may be a disk or file system error." I have run SFC, chkdsk but nothing was found. I also tried deleting this key. It disappears but if I close then reopen regedit, the key comes back. How do I fix this error?