Below is a list of unused keyboard shortcuts that you can use to create shortcut hotkeys. The bottom right column contains all of the two key shortcuts that are still unused on most windows machines.

Ctrl+Alt+A
Ctrl+Alt+B
Ctrl+Alt+C
Ctrl+Alt+D
Ctrl+Alt+E
Ctrl+Alt+F
Ctrl+Alt+G
Ctrl+Alt+H
Ctrl+Alt+J
Ctrl+Alt+K
Ctrl+Alt+L
Ctrl+Alt+M
Ctrl+Alt+O
Ctrl+Alt+P
Ctrl+Alt+Q
Ctrl+Alt+R
Ctrl+Alt+S
Ctrl+Alt+T
Ctrl+Alt+U
Ctrl+Alt+V
Ctrl+Alt+W
Ctrl+Alt+X
Ctrl+Alt+Y
Ctrl+Alt+Z
Ctrl+Alt+F1
Ctrl+Alt+F2
Ctrl+Alt+F3
Ctrl+Alt+F4
Ctrl+Alt+F6
Ctrl+Alt+F7
Ctrl+Alt+F8
Ctrl+Alt+F9
Ctrl+Alt+F10
Ctrl+Alt+F11
Ctrl+Alt+1
Ctrl+Alt+2
Ctrl+Alt+3
Ctrl+Alt+4
Ctrl+Alt+5
Ctrl+Alt+6
Ctrl+Alt+7
Ctrl+Alt+8
Ctrl+Alt+9
Ctrl+Alt+0
Shift+Alt+A
Shift+Alt+B
Shift+Alt+C
 
Shift+Alt+D
Shift+Alt+E
Shift+Alt+F
Shift+Alt+G
Shift+Alt+H
Shift+Alt+I
Shift+Alt+J
Shift+Alt+K
Shift+Alt+L
Shift+Alt+M
Shift+Alt+N
Shift+Alt+O
Shift+Alt+P
Shift+Alt+Q
Shift+Alt+R
Shift+Alt+S
Shift+Alt+T
Shift+Alt+U
Shift+Alt+V
Shift+Alt+W
Shift+Alt+X
Shift+Alt+Y
Shift+Alt+Z
Shift+Alt+F1
Shift+Alt+F2
Shift+Alt+F3
Shift+Alt+F4
Shift+Alt+F6
Shift+Alt+F7
Shift+Alt+F8
Shift+Alt+F9
Shift+Alt+F10
Shift+Alt+F11
Shift+Ctrl+A
Shift+Ctrl+B
Shift+Ctrl+D
Shift+Ctrl+E
Shift+Ctrl+F
Shift+Ctrl+G
Shift+Ctrl+H
Shift+Ctrl+J
Shift+Ctrl+K
Shift+Ctrl+L
Shift+Ctrl+N
Shift+Ctrl+P
Shift+Ctrl+Q
Shift+Ctrl+R
 
Shift+Ctrl+S
Shift+Ctrl+U
Shift+Ctrl+W
Shift+Ctrl+Y
Shift+Ctrl+Z
Shift+Ctrl+F1
Shift+Ctrl+F3
Shift+Ctrl+F4
Shift+Ctrl+F5
Shift+Ctrl+F6
Shift+Ctrl+F7
Shift+Ctrl+F8
Shift+Ctrl+F9
Shift+Ctrl+F10
Shift+Ctrl+F11
Shift+Ctrl+Alt+A
Shift+Ctrl+Alt+B
Shift+Ctrl+Alt+C
Shift+Ctrl+Alt+D
Shift+Ctrl+Alt+E
Shift+Ctrl+Alt+F
Shift+Ctrl+Alt+G
Shift+Ctrl+Alt+H
Shift+Ctrl+Alt+I
Shift+Ctrl+Alt+J
Shift+Ctrl+Alt+K
Shift+Ctrl+Alt+L
Shift+Ctrl+Alt+M
Shift+Ctrl+Alt+N
Shift+Ctrl+Alt+O
Shift+Ctrl+Alt+P
Shift+Ctrl+Alt+Q
Shift+Ctrl+Alt+R
Shift+Ctrl+Alt+S
Shift+Ctrl+Alt+T
Shift+Ctrl+Alt+U
Shift+Ctrl+Alt+V
Shift+Ctrl+Alt+W
Shift+Ctrl+Alt+X
Shift+Ctrl+Alt+Y
Shift+Ctrl+Alt+Z
Shift+Ctrl+Alt+F1
Shift+Ctrl+Alt+F2
Shift+Ctrl+Alt+F3
Shift+Ctrl+Alt+F4
Shift+Ctrl+Alt+F6
Shift+Ctrl+Alt+F7
 
Shift+Ctrl+Alt+F8
Shift+Ctrl+Alt+F9
Shift+Ctrl+Alt+F10
Shift+Ctrl+Alt+F11
Shift+Ctrl+Alt+1
Shift+Ctrl+Alt+2
Shift+Ctrl+Alt+3
Shift+Ctrl+Alt+4
Shift+Ctrl+Alt+5
Shift+Ctrl+Alt+6
Shift+Ctrl+Alt+7
Shift+Ctrl+Alt+8
Shift+Ctrl+Alt+9
Shift+Ctrl+Alt+0
Alt+B
Alt+C
Alt+D
Alt+I
Alt+J
Alt+K
Alt+L
Alt+M
Alt+N
Alt+O
Alt+P
Alt+Q
Alt+S
Alt+U
Alt+X
Alt+Y
Alt+Z
Alt+F1
Alt+F2
Alt+F3
Alt+F6
Alt+F9
Alt+F11
Ctrl+B
Ctrl+D
Ctrl+E
Ctrl+J
Ctrl+R
Ctrl+W
Ctrl+F7
Ctrl+F9
Ctrl+F11