Open My Computer.

Locate the program file (.exe) or the program’s shortcut icon. Right-click the program file or shortcut, and then click Properties.

With the cursor in the Shortcut key box, select the keyboard key you want to use in combination with CTRL+ALT. Shortcut keys automatically start with CTRL+ALT. The Shortcut key box will display None until you select the key and then the box will display Ctrl+Alt+the key you selected. You cannot use the ESC, ENTER, TAB, SPACEBAR, PRINT SCREEN, SHIFT, or BACKSPACE keys.