[wlug] boot problems

Since installing the synaptic update last month I have not been able to boot to Ubuntu, (and I have been using Windows ever since) I get the following error on boot up kernel /boot/vmlinux-2.6.10-5-386 root=/dev/hda1 ro quiet splash Error 17: Cannot mount selected partition root (hd0,0) Filesystem type unknown, partition, typ 0x7 after this I can get to Grub and boot to WinXP only System is 2 HDD, 10GB has Ubuntu, 60GB has WinXP Had a look on Ubuntu forums, some people have reinstalled Ubuntu after booting from a bootable CD to get around this problem. Are there any other options? My experience level is not very high having just installed Ubuntu at the fest last month. Cheers Justin Hyde