Issue with adding computer to workgoup

We have a small workgroup running here with no more than six machines on it. I recently added a Lenovo think pad and I’m having issues with other computers seeing mine.

I have joined the workgroup with no problems. I can see/access other shares and printers with not problem. But other computers can’t see mine. We can ping back and forth with no problems but my machine is simply not visible to them. BTW, I do have a printer and a couple of folders shared.

Windows firewall is turned off and I’ve temporarily turned off anti-virus software, but still no good.

Any ideas? Thanks.