So much for my great idea of upgrading my HTPC from Windows 2000 to XP Home .... Now when I do a shutdown, the PC does not turn itself off: it does the usual shutdown sequence, makes the right kind of switching itself off noises but doesn't actually switch the power off! The only way I can switch it off is to press the on/off button for 5 seconds or pull the plug out. As I now keep forgetting the thing is in effect still running, it has been bad for my electricity bill and yesterday my power supply finally packed up! I have the old Windows 2000 installation installed in parallel: there everything works fine with the shutdown. This one has really got me stumped: any ideas?