what does this mean. . .

"This file does not have a program associated with it for performing this action. Create an association in the Folder Options control panel."
And I was just trying to run a defrag, then this.
What am i supposed to do and how dit it happen in the first place?

 

Basically you attempted to double-click or open a file of some sort and the file type or extension is used to determine which application is used to open (or perform the default action on) the file but in your case your machine doesn't know which application to use.

If you know the extension and you want to tell your machine that a certain application can be used to open the file then press Start/Settings/Folder Options... and set up the file type/application association.

 

Well, what I did was go to my control panel, performance and maintenace, rearrange items. .
and thats what I got. I don't happen to know the extension.