Click the start menu and type in control, then click Control Panel from the suggestions list.
Depending on your set up, you will see something that looks like this:
If it looks like the first image, click View devices and printers, which can be found under the Hardware and Sound category. If it looks like the second image, click Devices and Printers.
Right click the printer to share, and click Printer properties.
(Note that here, we are using the generic / text only printer as an example. Yours will be called something like Label Printer)
In the sharing window, click the Sharing tab.
Tick the Share this printer checkbox, and give it a name, something like LabelPrinter. Note that you should avoid using spaces or symbols for compatibility.
To do this, click the arrow next to All Control Panel Items, near the top left of the Devices and Printers window, and click Network and Sharing Center.
Click Change advanced sharing settings, which can be found on the left.
It gets a little trickier here. This is split into sections, usually named things like "Private" and "Home or Work" and "Guest" or "Public". Each section needs to be expanded in turn, then file and printer sharing set to on, and password protected sharing set to off.
Finally, click Save changes.