To uninstall Office Template Collection, please follow these steps:

1. Open the control panel. You can find it by searching for "Control Panel" in the Start menu.

2. In Control Panel, select "Programs" and then click "Programs and Features."

3. Find "Office Template Collection" or a program with a related name in the program list.

4. Click on the program and select "Uninstall" or "Change."

5. Follow the on-screen instructions to complete the uninstall process.

If you are using a newer Windows system, you can also uninstall the program through the Settings app:

1. Open the "Settings" app by clicking the gear icon in the start menu or using the shortcut key Win + I.

2. Click "Apply".

3. Find "Office Template Collection" in the application list.

4. Click on it and select "Uninstall".

5. Confirm the uninstall operation.

After completing the above steps, the Office Template Collection should be uninstalled. If you encounter problems, please refer to the help documentation that comes with the program or contact technical support.