Mod Edit:Split from http://www.bleepingcomputer.com/forums/t/256692/how-to-back-up-windows-7-sticky-notes/ ~boopme
What to do if you have deleted a Sticky Note by mistake.
As someone earlier noted, Sticky Notes are saved in the file C:\Users\<USERNAME>\AppData\Roaming\Microsoft\Sticky Notes\StickyNotes.snt
This only saves the current screen. If you use a backup program, you can use it to restore an earlier version, where you may find the note you deleted. When you restore the file, it will be in the above location, but will have been given a new file type. Instead of .snt, it will be .snx, where x indicates a version number (sn0, sn1, sn2, etc). To open this, you will have to rename it as a ,snt. file. Before you do this however, rename your current file as a different .snx or it will be deleted.
After you have recovered the deleted note, copy it onto a Notepad, then go to the above file and rename your previous current file as an .snt to get it back. When you have it back, you can paste the recovered note from Notepad onto a new Sticky Note.
As someone else said, the better way is just to copy your notes onto Notepad and save them in a file regularly. You can leave the originals up on the screen so that they will be handy, but can rest easy knowing that you have an easily accessible back up.
Edited by boopme, 23 February 2013 - 11:07 AM.