I must have been struck by a nasty virus. When I boot my computer, I get a screen with the following message instead: "Info: the boot selection failed because a required device is inaccessible." I can't boot in Safe Mode. Windows is not found. I booted my Win7 install DVD and went into Repair, but it doesn't even SEE my Windows installation! Auto-repair doesn't work. Entering the CLI, I can find my Boot drive on G: (not unusual). A DIR shows my "Windows" folder plain as day. Opening it (cd \Windows | dir) shows all contents intact. I tried executing the following commands: BootRec /Fixmbr (reports "success".) BootRec /Fixboot (reports "Extension not found". Google has NOTHING on this error.) BootRec /Rebuildbcd (finds Windows on G:, but when I say Yes to repair, I get "Extension not found" again.) What in the heck happened? How do I fix this? HELP!