I just upgraded my Macbook Pro from Snow Leopard to Lion, and now when I boot into Window 7 using Bootcamp I get the error "Operating System not found."
Following the advice at http://reviews.cnet.com/8301-13727_7-20090187-263/boot-camp-partitions-not-working-after-installing-os-x-lion/, I found that I had MacFUSE installed, so I uninstalled it. The problem still persists.
That article also suggests the possibility that there could be too many partitions on my drive, but Disk Utility says there are only two: Bootcamp and my OSX partition.
I can still access the files on my Windows partition through Finder.
Does anyone know how to fix this problem?