Heh. Our machines at work are hilarious.
They're dual quad-core xeons, with 15k rpm SCSI raid (a bit of a waste as all they run is thin client stuff and net streamed stuff, but that aside...). They take ages to boot - the SCSI susbsytem takes about 1 minute to go though it's POST. The it boots XP, which is very fast - until you actually have to log in.
Then comes all the crap loaded on - Antivirus, other security stuff, PC anywhere, various diagnostics, Ghost, all the various driver toolbar/hotkey things. Then finally, you can load the actual software. The main software is java, and that takes an absurd amount of time to start. No idea what it does, because CPU usage and HD activity are at zero while it does it.
This would all be fine, if the system actually worked properly - but it doesn't. The software, or one of its supporting drivers/services, crashes with incredible frequency - typically about once an hour, and if it's a service that goes, it's power off time (which usually has to be done manually, because the hung service will block a clean shutdown indefinitely).