Here's a couple of my faves.
If you install a new video driver while using large fonts, reboot as usual, now you are back in XP with small fonts. Goto your display properties to change back to Large Fonts, only now, the menu says you are still using large fonts, despite the fact that you have small fonts. So, you select small fonts, needs reboot. Back in, select large fonts again, *Another* reboot. Finally. 🙄
Turn off the Windows help service, in the services menu. Now, when YOU want anything help related, You are rightly told there's an error. But when XP wants to forcefully tell you anything help related (normally web based), it cunting-well turns the service back on, even though you "Disabled" it.
Double-click "My Computer", for explorer. Move/stretch the window to your liking, then minimise it to the taskbar. Now Double-click "My Computer" again, then close it. Now maximise your other window that you put in the taskbar, and close it. Now lastly, Double-click "My Computer"again, and the window isn't where you left it, despite it being the Last window you closed.
I know it sounds a bit silly, but I often forget I have explorer already open (but minimised), and open up another window by accident, and lose all my window settings.
Highlight a .AVI file, or a movie file, and try and move it somewhere. You are told, more than often, that the file is in use, even though it isn't. Yet you can cut it, then paste it where you want it.
The evil that is WFP (Window File Protection). If there's a left-over DLL file, after you uninstall a program. Or, a program crashes badly and you need to re-boot XP. Now try and delete that file/directory, as it will more than likely be in use. Boot to safe mode, and it's still in use, and you cannot delete it.
regsvr32 /u xx.DLL Filexx
Will "unregister" the DLL from Windows, and allow you to delete the flipping thing. And if all else fails, Boot the XP CD to the recovery console, log in, then delete it.
Athlon 64 3000+ stock
MSI NForce 4 K8N Neo Platinum
2Gb RAM
nVidia Geforce 6800GT stock clocks
SBLive! Platinum + Audigy ZS2 Drivers
WinXP Pro SP2