IP Changer is a small little utility which lets you change the IP address of your computer in between four different configurations you specify.
As shown in the snapshot above, you can specify four different configurations at your end and apply any of the configurations any time just with some simple mouse clicks.
One of the most annoying this I had experienced in windows is when ever I play a game on my desktop or laptop after resuming back from the game. I was used to find my desktop cluttered and all the desktop icons scattered every where.
This was really frustrating for me, as I had to rearrange them on the desktop area for easy accessibility. DeskLock is such free software which lets you lock your desktop icons locations so that they can not move from the specified positions you had set.
You just need to make sure that this small utility is running in the system tray and irrespective of what ever you do the desktop icons will not move from their locations