Command Prompt (Cmd.exe) Runs Files That Do Not Have Executable File Name Extensions

Command Prompt (Cmd.exe) Runs Files That Do Not Have Executable File Name Extensions

Another tip:
How to open files and folders with a single click

By default, clicking once on a file or folder in My Computer or Windows Explorer highlights it; you have to double click to open it. But if you're really lazy - er, efficiency-minded - and want to be able to open items with just one click, you can configure XP to do so. Here's how:
Click Start | My Computer
In the My Computer console, click Tools | Folder Options
Under "Click Items as Follows" at the bottom of the General tab, select "Single-click to open an item (point to select)
Click OK