What if the win7 computer cannot run the executable file?

What should I do if I receive a "Do not have a program associated with the file to execute" when I run the file? If I re-select the corresponding open program, I still can't solve this problem. Why not try the method we introduced? But in fact, the method is very simple, just create a new Notepad file, and then enter the following:
WindowsRegistryEditorVersion5.00
[HKEY_CLASSES_ROOT.exe]
@="exefile"
" ;ContentType"="application/x-msdownload"
[HKEY_CLASSES_ROOT.exePersistentHandler]
@="{098f2470-bae0-11cd-b579-08002b30bfeb}"
At the end of the day, choose Save As, Then select the format as .reg and save it!