Ok this is not a fix - but it will stop the program.
Open task manager and go to processes. There you will see explorer.exe . You will need to end this process. Don't be alarmed it will kill most everything you see except the task manager itself and stop the deskscapes from running. Then go to users tab in task manager and there is a logoff button at the bottom right. Logoff and it will take you to the login screen where you can log back in. Once you log back in an error with explorer will be generated and stop deskscapes from being started again with explorer. Thus it will give you a solid background wallpaper. From here you can go to your personlize for your desktop again to select something besides deskscapes.
From the way it sounds you may have a corrupted explorer and/or it may need to be reinstalled. But I would need more info as to what security software you are using and such.
Which could be the cause also.
Let me know if this works...
