When you delete a Sticky Note in Windows 7, you are prompted for confirmation. If you check the Don’t display this message again check box, to stop later prompts, you will not be prompted again the next time you delete a sticky note.
If you wish to re-enable it back, then there are 3 ways you can re-enable the delete confirmation prompt.
3. Edit the registry. This tip comes to you courtesy my colleague Ramesh Kumar.
Open regedit and navigate to the following key:
Double-click the PROMPT_ON_DELETE registry entry, in the right panel.
In Value box, type 00000001 & then click OK. Exit.
Windows 7 Sticky Notes – Everything the Notes Gadget wasn’t may also interest you!