Never give up!
Try this:
Open Windows Explorer (Windows key + E will do it)
Tools - Map Network Drive
Pick an unused letter in the "Drive" box, then click "Browse"
You should see "Microsoft Windows Network" - click on the + beside that
and drill down to see how far you get.
Windows usually uses the default workgroup name "Workgroup" - so unless you used something else, that's where they should be.