What is wrong when u get disc reading error when u boot up your pc

bad/old hard drive

This seems to be a failure of the HARD DISC and so the PC does not boot and go to the OS.
This means that the hard disc must be replaced if the PC does not boot up and so the OS must be reinstalled.

sounds like your boot ini file is corrupt if you have os disc put it in and try and repair.otherwise you may have to reformat hard drive

Try and boot from a bootable disc (windows) and if it boots then you need to look at a reinstall of windows. If nothing happens then you have a bigger problem. make sure when put the disc in you have you bios set to boot from cd first then hard drive so it will read your cd first. Good luck

TRY F8 ON BOOT UP TAPP REALLEY FAST IF U CATCH IT INTIME GO TO OPTION LAST KNOWN GOOD CONFIG .....ONCE IT DONE LET IT DO ITS THING IF IT BOOTS LET IT ..THEN ON FULL BOOT LEAVE MIN OR 2 THEN RESTART UR SYSTEM .....SEE IF ANY DIFFRENT

If you see disc error when booting, most likely it is either a hard drive failure or a loose interface connection between the hard drive and the motherboard.

First, ensure that the bios is reading the hard drive and that the hard drive is part of the boot sequence. If you have a known working drive and the drive is not been read by the bios, you will get the Disc Boot failure error because windows resides on the disc which the bios cannot access.
Secondly, if the bios is reading the disc then ensure that the disc is set as part of the boot sequence-preferably the item after DVD drive should be Hard Disc in the boot menu.
If both of these items are in correct order then you could have a bad boot sector on the drive. Run a C:Chkdsk. If no bad sectors are found try C:Fixmbr-ensure that the Windows installation disc is in the CD/DVD drive when running Fixmbr.
If that fails do a clean install of windows.

Good Luck

i dont think the internet files had a difference.
a disk read error mean thateither you have a floppy in your computer or the hard drive is corrupt. that cannnot be fixed so i recomend getting a new hard drive.
Jaddude

power down the pc unplug it and when it restart up go to F2 and see if you booting in c or in your cd rum try this

hmmm...well..that is usually done from a boot up from the install CD. Are you doing it that way?

got backup?