grub corrupt?

[barth]

Startte net mijn pc op, en de grub gaf error 16 en error 18...met behulp van de livecd en wat tovertypen in de terminal heb ik dit kunnen repareren...Wat ik nou graag zou willen weten: hoe kan dit zo ineens...gisteren gewoon uitgezet en vandaag ineens corrupt

[jan11000]

Kernel geupdate?

[kihid]

Error 16 : Inconsistent filesystem structure
    This error is returned by the filesystem code to denote an internal error caused by the sanity checks of the filesystem structure on disk not matching what it expects. This is usually caused by a corrupt filesystem or bugs in the code handling it in GRUB.

Error 18 : Selected cylinder exceeds maximum supported by BIOS
    This error is returned when a read is attempted at a linear block address beyond the end of the BIOS translated area. This generally happens if your disk is larger than the BIOS can handle (512MB for (E)IDE disks on older machines or larger than 8GB in general).