I wanted to resize the partitions on an external hard drive, so I installed Partition magic 8 on my brand new Windows 7 machine. I have used PM on XP and just wasn't thinking when I installed it that it wasn't compatible. Now my computer won't boot. I can't roll back to a previous time because I get an error there too. I am trying to figure out what PM altered to cause this. I am dreading reinstalling the OS so I want to exhaust all other possibilities. Anyone familiar with PM know what caused this?