Boot up problems

Ok had several errow iwth my computer, got most of them=20
fixed but i have a new one, seems im not detecting my=20
hard drive, my computer boots up fine now but i get this=20
error "DISK BOOT FAILURE, INSERT SYSTEM DISK AND PRESS=20
ENTER" any and all help thanx in advance, here lil post=20
of what my previous issues where if it helps at all:

ok iv made some progress, my computer does now boot up=20
and loads, it trys to detect my hardrives but it cant, i=20
get the error" CMOS checksum error - Defaults loaded=20
Warning! CPU has been changed. Please re-enter CPU=20
settings in the CMOS setup and remeber to save before=20
quit!:" It just hangs there, any help on what i need to=20
change or how to do it, any help thanx in adavance.
-----Original Message-----
Hello,

The error you are mention is related to the bios, you=20
need to get a new=20
battery for your motherboard Don=B4t worry it=B4s not=20
expensive... Open your=20
computer and check in the motherboard to locate a=20
battery (it=B4s like a watch=20
battery) it should be something like CR2025 or CR2030 or=20
something like that=20
you can get a replace one at any photo store.

After you replace the battery on startup you should get=20
into bios and change=20
the hour/date that is reverted to when the motherboard=20
was built, and save.

wrote in message=20
...
also forgot to mention i got an error ones of the times
it didnt start up it was "Checksum Bios error: thanx
again in advance
-----Original Message-----
Ok i been having lots of problems with my compute
lately,
it has just started recently. At first my computer=20
would
just lock up , simple restart would fix it every time,
it
usually didnt occur very often. But then it got more
frequent, then i had more problems, my computer had
problems starting up, it would freeze during various
stages of booting up, if i made it to windows i was=20
fine
unless it locked up while i was using it. It wasnt as
bad
i just reset it and it would go correctly again, but it
got progressively worse, to the point where my video
card
isnt even regeistering anymore, i turn on my computer
and
alls i have is a black screen and i think my har drive
is
trying to spin but its not working, i could get on my
computer by ids have to reset it till it finally wen
through and i got into windows, i then ran virus scan,
and it came up clean, prblem persistested so i
reformatted. That seemed to do the trick worked fine=20
for
a few days and then dejavu all over, did the exect=20
same
thing this time, to the point i cant even get it on
anymore? can anyone please help me with this, i built=20
he
computer a year ago and this just started past month or
so, and help is greattly appreciate, thanx in advance
.