If you want to share your printer, but other systems on the network cannot access it, your printer is not shared. To share a printer, go to Control Panel > Printers and Faxes. Select the printer you want to share, right-click it and select Sharing. Here, select “Share this printer” and give it a name that others can use to connect to it.
Similarly, if you want to share a folder, right-click on the folder, go to “Sharing and security…”, and check the box “Share this folder on the network”. If you want others on the network to modify the contents on the folder, check the box “Allow network users to change my files”. Click Apply and then OK. Now other systems under the same workgroup should be able to access the printer and the shared folder.