When you pin folders to the Windows Explorer Taskbar icon, there is a limit to the number of items that can be displayed due to space constraints. While there isn't a specific registry key that limits the number of items, Windows dynamically adjusts the number of pinned items displayed based on the resolution of your screen and the available space on the taskbar. In your case, with a resolution of 1280x1024, you should have enough space for additional pinned items. However, Windows may still restrict the number of items displayed in order to maintain a clean and organized taskbar interface. Here are a few things you can try to address this issue:
1. Use Jump Lists:
Windows uses Jump Lists to show recent items and pinned items. If...