Very useful utility - IconSaver.exe
I use my laptop at a very high resolution of 1400x1050 and I am also used to keeping a lot of icons and files on my desktop, usually neatly arranged by priority. But sometimes,when the laptop is connected to a projector, the resolution is automatically switched to something lower 1024x768 and all my icon arrangement is gone.
[IconSaver]
This utility solves the problem. Rename it to something shorter (mine are "is.exe" for "iconsave" and "ir.exe" for "iconrestore") and just place them in a folder on your path (usually i have a Utils folder in which i dump all the frequently used shortcuts and executables and put this folder in the system PATH). So just before connecting the projector just Windows+R -> is, and after the presentation is done Windows+R -> ir. All ok again.