I ran the command "assoc .exe=.xyz" Now I cannot run any .exe files. At first, whenever I tried to run a .exe file, i got the "Open with" dialogue. Then when I tried to open cmd to try to undo what I have done, I chose cmd.exe at the dialogue. After that, a new cmd opens up whenever I open any of the .exe files. Help please. How can I recover my .exe file association without having to reinstall windows? i was experimenting with the command and I did not know that I can break things that way. Thanks in advance.