well as you said, that is fairly obvious and I tried doing that. however, the problem is I can't reach to bios menu, saying as soon as I turn on the pc, it directly starts from the grub rescue mode and until now i couldn't manage to enter the bios menu...
I am using an internal CD-ROM drive...
to be more specific I'll explain the steps that I am doing
1st (while ubuntu installe cd is inside the cd-rom drive) turn on the pc
2nd try to enter the bios menu!
the grub rescue mode appears and says
unknown file system
Last edited by Serdala LeBowski; 07-18-2011 at 06:29 AM.
Reason: problem solved