Should Windows 7 product id be kept secret?

Names are loosely translated from Norwegian and probably not right in the English version.

A few days ago I got careless when posting a screenshot of my system info (the one which shows the Windows experience based on hardware) and forgot to censor anything. I'm wondering if any of this information can be used? (I'm thinking in particular about my Windows product id, workgroup and computer name). In that case, is it something I can do to reduce the damage?

Didn't really strike me before now that I could have screwed up bad.