I used hp recovery manager to install Windows 7. I previously had Ubuntu 11.10 installed. Now when I boot I get a grub rescue prompt and error:unknown filesystem. Does anyone know how to fix this? Thanks.
If windows 7 is installed in the same partition where ubuntu was previously installed then there is no way to rescue ubuntu. If you do not want to use ubuntu and continue to use win7 only then you can restore windows boot manager using windows installation dvd. Follow instructions after booting from windows dvd.
If windows and ubuntu are installed in separate partitions you can easily revive grub boot manager using a ubuntu live system. The internet has a lot info how to do that.
