After last update computer won't start

on febuary 20th I downloaded the newest system updates for leopard, after getting them downloaded I restarted my computer and haven't got it up and running since.
after restarting the first time it went to the grey apple logo screen with the progress circle at the bottom and ticked away for a few hours, then it flashed over to a blue screen. Since that time every time I've tried starting my computer it has had the same problem.
I can't boot into safemode, I get no warnings, just a grey screen that eventually goes to a blue screen, in the blue screen I get my mouse arrow that I can move but nothing else.
I've talked to some of the IT guys where I work, but have had no luck, and I've tried the reset the PRAM, and it still can't boot in any mode, and no other discussion seems to have a solution that I've found. Its now going on a month and I have work I need to get done and have had to resort to the use of my old ragidy peice of crap (PC) which is like trying to do brain surgery with a plastic spoon
any and all help is appreciated
thanks
Joe Jones

please do not duplicate posts. It gets very confusing.
I responded to the other post which has been deleted.
Message was edited by: nerowolfe

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