Win8.1 computer management can not open how to solve?

1, open Win8.1 system "Notepad", and then enter the following code in the Notepad panel:
Windows registry editor version 5.00
[hdey_classes_root.exe]
@=“exefile”
"content type”=”application/x-msdownload”
[hkey_classes_root.exepersistenthandler]
@=”{0910f2470-bae0 -11cd-b579-010002b30bfeb}”
2. Then, on the text document window, save the file as, enter the file name xx.reg in the Save File As window, and then click the Save button to save the file.
3, double-click the file, in the pop-up registry editor window, click the “ Yes & rdquo; button.