my computer isnt coming up

[alcindor]

when i start my computer  it goes  to the  first screen,  the  xp  screen  but  it wont  go  to the  welcome  screen, it says  it cant find  any disk  drive  and  it  says  to  go to st  up  but then it goes  right  back to that same  screen.  do i have a problem  with my  motherboard?

[ale52]

Need...more...info...gasp 
antivirus & antispyware protection / service packs installed / when did it start happening / did it ever work right / installed any new software / tried booting into safe mode and doing a system restore / checked the BIOS to see if it sees any hard drives / checked all your cabling to the drive?

Alan <><