I have Ubuntu as the only OS on my netbook, and as a dual-boot on my laptop.
I started a Ubuntu 11.10 CD to burn on Windows and left the house. On my return, I took out the CD, shut down, and went to bed. When I booted up my computer the next morning, it sat there and did nothing at the "Starting Windows" screen.
I waited two hours for it to start and then gave up. I tried Safe Mode but this hangs at Classpnp.sys, and Startup Repair reports that it "cannot fix the problem".
I did a little Internet research and found that it could be fixed by replacing Classpnp.sys. I retrieved the file from another laptop, went into Ubuntu, replaced the file, and restarted. The computer still refused to start.
Any ideas how to fix this?