What Did I Do?

I've been at the computer for a little over half an hour, deleting temporary internet files (again) and changing some of my internet options (I have no idea what I changed - I hope it wasn't important) and running a virus check. Still feeling frustrated because I couldn't see my blog I looked at other blog hosts and thought about signing up. I came back here to check something on my blog and voila! I can now see my blog.

I just wish I knew what I did so that if it ever happens again I'll be prepared.