How To Enable Printing on Home LAN…?

I have a XP-pc which is directly (locally) connected to a Printer.

The XP-pc is wired to a Wired+Wireless Router. There are other computers connected (wired or wirelessly) to the Router.

For a year everyone could print to the Printer. However, a few days ago, to make the LAN more secure, I Turned OFF a few Services on my XP-pc.

As a result, the Other PCs CANNOT print anymore. I remembered most of the Services I had turned OFF, but still the Other PCs Cannot Print.

WHICH SERVICE COULD I HAVE TURNED OFF on the XP-pc that could have Disabled other PCs to Print to the Printer (that is locally connected to the XP-pc) ???

Please help !!

Thank you.