[Ubuntu-SG] My ubuntu crashed out on me, pls help.

[ttq8280 at yahoo.com.sg]

In May 2009 I asked for and received an airmailed copy of ubuntu version 
8.10 which I installed on my desktop AMD  Athlon XP, 2000 MHz (15x133)2400+,
having 1.5GHz RAM.  It was smooth sailing for  surfing the net, listening
to music and viewing youtube.

A couple of days later,  a pop-up Update Manager came on and told me that
updates were available for my version. I clicked update and was told to type
my password. It was a longish download due to my slow internet server. Upon
downloading and subsequent installation, my version of ubuntu was upgraded to
'jaunty 9.04' (or similar - forget the version).

Ubuntu Jaunty  was fine except that booting up was always exasperating for
me as it took more than 3 restarts, sometimes more, before the pc could be
booted up.  OK, I'm not complaining 'cause this is a free os and I should be
grateful to you guys at ubuntu for doing such great jobs providing free os
software to the world.  I salute you.

Last Sunday, as usual I required a few restarts to boot up the pc.  While
listening to a song on youtube, I swiched to another window to surf. The
music stopped playing and the pc hanged. I waited for about 15 minutes to see
if the pc could return to life. But after being certain that nothing would
happen , I restarted the pc. It could not be booted up.

I attempted to boot up the pc for the last two days and it seemed that I
needed help. The screen showed the following when I start the machine -

"Boot from (hd0,0) ext 3

62e85596-d866-42d1-9106-0ae7921af82b

Starting up ...

crc error

-- system halted --?

Please help, thanks.