I have Windows 7 pre-installed on my laptop, a Sony VAIO EB46FG. I successfully installed Fedora 16 in a dual boot configuration. I was able to use both OSes for few days. However, now I'm getting a GRUB error saying "unknown filesystem". The error started when I created a partition in the available free space. I did not modify the other partitions. I have made a live USB for Fedora and booted it, but a strange thing happened: the USB is not booting either.
I have very important data on the laptop. I just want to back into Windows.