check what programs start when you switch on the computer?
1] Goto Start > All Programs, and select "Start Up". What programs do you have in there that start when you turn the computer on? Is one of them anything to do with a Gallery? If so, you can right click that shortcut, and delete it from the Start-up folder. This does not delete the program, only the shortcut.
2] If that doesn't show anything, try this; Goto Start > Run, type in "msconfig" (without the quotes) and click OK. In the System Configuration Utility dialogue window that opens, select the Startup tab, and check the list of programs for anything that resembles your Gallery.
If you find anything, take off the tick, and then click Apply, then OK.
If you get a message saying that the change will take effect the next time you start Windows, click OK. Then shutdown and restart the computer. When Windows loads up, you will get a message saying that you have changed the Startup settings. You can disable this message so that it does not show again by taking off the tick in the lower left corner, and click ok.
Does this help?
It does not resolve "why" you were getting the message in the first place, but until you can identify what this Gallery program is, I cannot say any more about it.