Had a "pleasure" today in reinstalling an operating system on an IBM laptop back to factory settings. Unlike most laptops, IBM doesn't provide their customers with rescue CD's, but use a portion of the computer's hard drive. I expected it to take 20 minutes at most, but it took over an hour and a half. Instead of simply reinflating an archived image and running a few updates, IBM chose to write a long and complicated script, requiring 3 restarts, that actually installed each and every program, including service pack 2 for Windows XP.
For my non-techie readers - did you ever try to scratch your right ear with your left foot? That's exactly what IBM did.