You DO sound somewhat mildly disturbed.....
I'd suggest a few cleansing breaths, visualizing pleasant thoughts, and a two by four stabbed violently through the monitor of your recalcitrant computer.....OK, that last is a bit over the top, but I do get your sense of frustration.
Since you are now back to a good starting point, and have a current backup of your installed working system, it may be time to consider why your last attempt at the update might have gone so badly....then download and install the
OSX10.4 Combo Update (follow the link) after having thought through the last attempt.
Did you run the Disk Utility on your hard drive before you updated? Sometimes there can be residual errors in your system that can interfere with the update process.
Did you disconnect all your peripheral devices prior to updating? Sometimes there can be unintended conflicts with open processes that third-party device drivers present.
Did you close out all open applications prior to your update attempt? Sometimes non-responsive applications get hung up and can halt the update process.
Do you REALLY want to revert to the Windows world, or were you just venting steam out of frustration?
Let us know how things go on your next attempt....we are all interested.
