> For the complete documentation index, see [llms.txt](https://support.barnetpos.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://support.barnetpos.com/pos-manager/troubleshooting/troubleshooting-barnet-pos-manager-doesnt-open.md).

# Troubleshooting Barnet POS Manager Doesn't Open

**BARNET POS MANAGER DOESN’T OPEN**

If POS Manager does not launch, the most common cause is that multiple instances are already running in the background. This often happens from double-clicking the taskbar shortcut. **Taskbar shortcuts only need a single click**—double-clicking can accidentally open several hidden sessions.

To resolve this, close the extra instances using Task Manager.

![](/files/4d1bbc53b5af77d7cc23ca045ee53536d2530e9f)

**How to Open Task Manager**

1. CTRL+ALT+DEL and Select Task Manager from the options

![](/files/62f25012f22e4a0b505fa0a804fbaac56253b9ec) ![](/files/286cf994f00b5522a849b70e06d27cde82febb79)

2. Search “Task Manager” from the Windows Start menu and open it
3. Use the taskbar search field, type Task Manager, and open it

![](/files/297710700ec0c5223d5d297e4809f03ffc5827be)

**Close Background Instances of POS Manager**

1. When Task Manager opens, it will default to the Processes tab.
2. Applications are listed alphabetically.

* Scroll down to P, or
* Type “POS” in the Task Manager window to jump to POS Manager.

3. Right-click each POS Manager entry and select End Task.

Repeat until all POS Manager processes are closed.

![](/files/b99b0c99acf8e474cebb1418bbd9f3c9c2cef76e) ![](/files/487134a333de55b05eccb2ed6e0c675945fc22c1)

**After Closing All Instances**

Close Task Manager, then try launching POS Manager again. It should open normally.


---

# Agent Instructions
This documentation is published with GitBook. GitBook is the documentation platform designed so that both humans and AI agents can read, navigate, and reason over technical content effectively. Learn more at gitbook.com.

## Querying This Documentation
If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter, and the optional `goal` query parameter:

```
GET https://support.barnetpos.com/pos-manager/troubleshooting/troubleshooting-barnet-pos-manager-doesnt-open.md?ask=<question>&goal=<endgoal>
```

`ask` is the immediate question: it should be specific, self-contained, and written in natural language.
`goal` is optional and describes the broader end goal you are ultimately trying to accomplish on behalf of the user. GitBook uses it to tailor the answer towards what is most useful for that goal.

The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.