I have done a really stupid thing! I issued the following command rpm -e kernel-2.4.22-1.2179.nptl and then rpm -i kernel*1.2174.nptl.*rpm and then rebooted the comp I wanted to switch from 2179 to 2174 kernel (as I was facing graphical bootup problems after the upgrade) Now the grub doesn't show the linux kernel to boot into fedora. I am not sure if 2174 kernel is installed or not. I cannot re-install the system, as I have some files whose back-up I didn't make and I donot want to loose them I have two partitions (made as default by anaconda - /boot and the other for entire sys) I also have windows installed in another partition. I tried to upgrade system through FC1 CD, but the upgrade/installation failed!!! Help me, what can I do. --