If you right-click or press Alt+Enter on a shortcut, Windows normally displays the context menu or Properties dialog right away, even if the shortcut is broken and points to a file or directory that no longer exists.
I have seen this take some time for broken shortcuts to
.exe files where Windows spends several seconds (in this case 15), presumably trying to resolve the shortcut, before it finally shows the context-menu or Properties dialog. Even deleting the files waits for 15 seconds before showing the deletion prompt. Copying or moving them does not seem to trigger the delay.
I thought perhaps it could be a network related setting, but it seems to apply to every (broken) shortcut regardless of where they point. I looked through TweakUI and found nothing. I looked through the registry for 15,000 (and 0x3A98) and found none that applied as well as 15 (and 0x0f), which had many hits, but none that were responsible for this.
Is there a setting that determines the timeout for resolving shortcuts?