Help! My PC And My Network Need Couples Counseling

For the past two weeks, I've been running the latest build of Windows Vista on my work machine here at PC World. Today I tried to log in to our network and got this alarming reply: "The trust relationship between this workstation and the primary domain failed."

How could this breakdown in the "trust relationship" have happened? Is it that my network is connecting with other PCs? Has my PC been complaining about my network to all its friends?

I rebooted and the problem went away -- for now. But as I look at my desktop and my network happily sharing data and working together, I'm haunted by the thought that this may be just a temporary reconciliation. In another couple of days, will my network have angrily closed off all its ports? Will my PC be searching for a wireless router to connect with instead? Because really, once the trust relationship has failed, what else is there but divvying up the MP3 files and moving on?